CN114739452B - Transformer oil conservator fault monitoring method, device and storage medium - Google Patents
Transformer oil conservator fault monitoring method, device and storage medium Download PDFInfo
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- CN114739452B CN114739452B CN202210287721.XA CN202210287721A CN114739452B CN 114739452 B CN114739452 B CN 114739452B CN 202210287721 A CN202210287721 A CN 202210287721A CN 114739452 B CN114739452 B CN 114739452B
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Abstract
The application discloses a transformer oil pillow fault monitoring method, device and storage medium, the method comprises the following steps: acquiring an oil level y in a transformer oil conservator and a first pressure p in an oil tank of a transformer body 1 Second pressure p at transformer oil conservator 2 And the temperature t in the transformer oil pillow; determining a standard oil level y corresponding to a temperature t 0 Lower limit value k of oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 The method comprises the steps of carrying out a first treatment on the surface of the Determining a standard first pressure P corresponding to a temperature t 10 First pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 The method comprises the steps of carrying out a first treatment on the surface of the Determining a standard second pressure P corresponding to the temperature t 20 A second pressure lower limit value n 1 *P 20 And a second upper pressure limit value n 2 *P 20 The method comprises the steps of carrying out a first treatment on the surface of the And inputting the acquired data into a fault judgment model to obtain a fault judgment result.
Description
Technical Field
The disclosure relates generally to the technical field of transformer sleeper monitoring, and in particular relates to a transformer sleeper fault monitoring method and device.
Background
The transformer oil pillow is mainly used for guaranteeing expansion and contraction of insulating oil in the oil tank. Common malfunctions of the oil conservator include oil level gauge damage (pointer stopped at high or low position), bellow stuck, bellow blow-by, breather blockage, etc.
However, in actual detection, the inspection and maintenance personnel inspection and the experience judgment of maintenance personnel or power failure inspection are mainly relied on, and a set of reliable inspection method and inspection device are not provided, so that the maintenance time is delayed and even the maintenance time is prolonged to influence power transmission.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a method, apparatus and storage medium for monitoring a transformer oil conservator fault.
In a first aspect, a transformer oil conservator fault monitoring method includes the steps of:
acquiring an oil level y, wherein the oil level y is measured by an oil level gauge arranged in a transformer oil pillow;
acquiring a first pressure p 1 The first pressure p 1 Pressure data measured by a pressure gauge arranged in an oil tank of the transformer body;
obtaining a second pressure p 2 The second pressure p 2 Pressure data measured by a pressure gauge arranged at a transformer oil conservator;
acquiring a temperature t, wherein the temperature t is measured by a thermometer arranged in a transformer oil pillow;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a being a set constant;
determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
according to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values;
according to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values;
according to the standard second pressure P 20 Determining a second pressure lower limit n 1 *P 20 And a second upper pressure limit value n 2 *P 20 ，n 1 <n 2 ；n 1 And n 2 Are set values;
setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 And inputting a fault judgment model to obtain a fault judgment result.
According to the technical scheme provided by the embodiment of the application, the fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) And outputting a fault judgment result to be that the corrugated pipe is jammed at the high oil level position.
In a second aspect, a transformer oil conservator fault monitoring system includes
The data acquisition module is used for acquiring temperature current I measured by a thermometer at the transformer oil conservator t Oil measured by oil level gauge in transformer oil conservatorBit current I y First pressure current I measured by pressure gauge in oil tank of transformer body P1 And a second pressure current I measured by a pressure gauge at the transformer oil conservator P2 ；
A current conversion module for converting the temperature current I measured by the thermometer t Converting to temperature t, and discharging oil level current I y Converting to oil level y, and converting the first pressure current I P1 Converting to a first pressure P1, and converting the second pressure current I P2 Converting to a second pressure P2;
a central processing unit for:
receiving the temperature t, the oil level y, the first pressure P1 and the second pressure P2 sent by the current conversion module;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a being a set constant;
determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
according to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values;
according to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values;
according to the standard second pressure P 20 Determining a second pressure lower limit n 1 *P 20 And a second upper pressure limit value n 2 *P 20 ，n 1 <n2；n 1 And n2 are set values;
setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 And inputting a fault judgment model to obtain a fault judgment result.
According to the technical scheme provided by the embodiment of the application, the fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Output fault determination
The result is a stuck bellows in a high oil level position.
According to the technical scheme provided by the embodiment of the application, the current conversion module converts the temperature current I according to the following formula (4) t Conversion to temperature t:
（L a1 ,L a2 ) The measuring range of a thermometer at the transformer oil pillow is used; (I) a1 ,I a2 ) For outputting the current thereof
Range.
According to the technical scheme provided by the embodiment of the application, the current conversion module converts the oil level current I according to the following formula (5) y Conversion to oil level y:
（L b1 ,L b2 ) The measuring range of the oil level gauge (4) in the body oil tank is; (I) b1 ,I b2 ) For its current
And outputting the range.
According to the technical solution provided in the embodiments of the present application, the current conversion module converts the first pressure current I according to the following formula (6) P1 Is converted into a first pressure p 1 ：
（L c1 ,L c2 ) Is a bodyMeasuring range of the internal pressure meter of the oil tank; (I) c1 ,I c2 ) For its current output range.
According to the technical solution provided in the embodiments of the present application, the current conversion module converts the second pressure current I according to the following formula (7) P2 Is converted into a second pressure p 2 ：
（L d1 ,L d2 ) The measuring range of the pressure gauge in the respirator of the conservator is; (I) d1 ,I d2 ) For its current
And outputting the range.
In a third aspect, a computer storage medium has a computer program, which when executed by a processor, implements the steps of the transformer oil conservator fault monitoring method described above.
The invention has the beneficial effects that: the application discloses a transformer oil conservator fault monitoring method, device and storage medium, wherein the method is characterized in that the oil level y at a transformer oil conservator is obtained, and the first pressure p in an oil tank of a transformer body is obtained 1 And a second pressure p at the transformer conservator 2 T calculating the standard oil level y through the temperature t 0 Standard first pressure P 10 And a standard second pressure P 20 Calculating the standard oil level y according to a formula 0 Standard first pressure P 10 And a standard second pressure P 20 By presetting a coefficient k 1 And k 2 Determining a lower limit value k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 The method comprises the steps of carrying out a first treatment on the surface of the Preset coefficient m 1 And m 2 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 The method comprises the steps of carrying out a first treatment on the surface of the Preset coefficient n 1 And n 2 Determining a second pressure lower limit n 1 *P 20 And a second pressure upper limit value m 2 *P 20 . Setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Second upper pressure limit value m 2 *P 20 And inputting a fault judgment model to obtain a fault judgment result.
The condition of real-time supervision body oil tank oil level, body oil tank pressure and conservator respirator pressure compares through actual value and its normal upper and lower limit value that floats respectively, combines fault model, can find out the trouble type fast, makes things convenient for the workman to overhaul fast, improves work efficiency.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 is a schematic diagram of one embodiment of a transformer oil conservator fault monitoring device of the present application;
FIG. 2 is a schematic diagram of a formula (1) of a transformer oil conservator fault monitoring method of the present application;
FIG. 3 is a schematic diagram of formula (2) of a transformer oil conservator fault monitoring method of the present application;
FIG. 4 is a schematic diagram of formula (3) of a transformer oil conservator fault monitoring method of the present application;
1. a first pressure gauge; 2. a second pressure gauge; 3. a thermometer; 4. an oil level gauge; 5. a data acquisition module; 6. a current conversion module; 7. a central processing unit; 8. a display module; 9. and an input module.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
As shown in fig. 1, a transformer oil conservator fault monitoring method comprises the following steps:
acquiring an oil level y, wherein the oil level y is measured by an oil level gauge 4 arranged in a transformer oil pillow;
acquiring a first pressure p 1 The first pressure p 1 Pressure data measured by a pressure gauge arranged in an oil tank of the transformer body;
obtaining a second pressure p 2 The second pressure p 2 Pressure data measured by a pressure gauge arranged at a transformer oil conservator;
acquiring a temperature t, wherein the temperature t is measured by a thermometer 3 arranged in a transformer oil pillow;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a being a set constant;
wherein, by measuring a plurality of sets of oil temperature and oil level data at the time of normal operation, as shown in fig. 2, formula (1) is fitted to find the values of k and a. Bringing the measured temperature t into formula (1) to determine the standard oil level y at this temperature 0 。
Determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
wherein, by measuring a plurality of groups of oil temperature and body oil tank pressure data during normal operation, as shown in fig. 3, formula (2) is fitted to calculate the values of m and b. Bringing the measured temperature t into equation (2), determining a standard first pressure P at this temperature 10 。
Determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
wherein, by measuring a plurality of groups of oil temperature and pressure data at the transformer oil pillow during normal operation, as shown in fig. 4, a formula (3) is fitted to obtain values of n and c. Bringing the measured temperature t into equation (3), determining a standard second pressure P at this temperature 20 。
According to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values; wherein k is 1 And k 2 Is set according to the experience of workers.
According to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values; wherein m is 1 And m 2 Is set according to the experience of workers.
According to the standard second pressure P 20 Determining a second pressure lower limit n 1 *P 20 And a second pressure upper limit value m 2 *P 20 ，n 1 <m 2 ；n 1 And m 2 Are set values; wherein n is 1 And n 2 Is set according to the experience of workers.
Setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 And inputting a fault judgment model to obtain a fault judgment result.
The fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) And outputting a fault judgment result to be that the corrugated pipe is jammed at the high oil level position.
The device can monitor the oil level of the body oil tank, the pressure of the body oil tank and the pressure of the conservator in real time, compare the actual value with the normal floating upper limit value and the normal floating lower limit value of the body oil tank, and can quickly find out the fault type by combining a fault model, thereby being convenient for workers to quickly overhaul and improving the working efficiency.
Example two
As shown in fig. 1, a transformer oil conservator fault monitoring system comprises
The data acquisition module 5 is used for acquiring the temperature current I measured by the thermometer 3 at the transformer oil conservator t Oil level current I measured by oil level gauge 4 in transformer oil conservator y First pressure current I measured by pressure gauge in oil tank of transformer body P1 And a second pressure current I measured by a pressure gauge at the transformer oil conservator P2 ；
A current conversion module 6 for converting the temperature current I measured by the thermometer 3 t Converting to temperature t, and discharging oil level current I y Converting to oil level y, and converting the first pressure current I P1 Converting to a first pressure P1, and converting the second pressure current I P2 Converting to a second pressure P2;
a central processing unit 7 for:
receiving the temperature t, the oil level y, the first pressure P1 and the second pressure P2 sent by the current conversion module 6;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a being a set constant;
determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
according to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values;
according to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values;
according to standard second pressureForce P 20 Determining a second pressure lower limit n 1 *P 20 And a second upper pressure limit value n 2 *P 20 ，n 1 <n2；n 1 And n2 are set values;
setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 And inputting a fault judgment model to obtain a fault judgment result.
The transformer oil conservator fault monitoring system comprises a first pressure gauge 1 positioned in a body oil tank, a second pressure gauge 2 positioned at the transformer oil conservator and an oil level gauge 4 positioned in the body oil tank, wherein the first pressure gauge 1, the second pressure gauge 2 and the oil level gauge 4 are electrically connected with a data acquisition module 5.
Further, the current conversion module 6 converts the temperature current I according to the following formula (4) t Conversion to temperature t:
（L a1 ,L a2 ) The measuring range of the thermometer 3 at the transformer oil pillow is used; (I) a1 ,I a2 ) Is the current output range of the thermometer 3.
Further, the current conversion module 6 converts the oil level current I according to the following formula (5) y Conversion to oil level y:
（L b1 ,L b2 ) A measuring range of the oil level gauge 4 in the body oil tank; (I) b1 ,I b2 ) For the oil
Current output range.
Further, the current conversion module 6 converts the first pressure current I according to the following formula (6) P1 Is converted into a first pressure p 1 ：
（L c1 ,L c2 ) The measuring range of the first pressure gauge 1 in the body oil tank is set; (I) c1 ,I c2 ) Is the current output range of the first pressure gauge 1.
The current conversion module 6 converts the second pressure current I according to the following formula (7) P2 Is converted into a second pressure p 2 ：
（L d1 ,L d2 ) The measuring range of the second pressure gauge 2 in the conservator breather is; (I) d1 ,I d2 ) For its current output range of the second pressure gauge 2.
The fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Output fault determination
The result is a stuck bellows in a high oil level position,
preferably, the central processing unit 7 is also electrically connected with an input module 9 and a display module 8, wherein the input module 9 is used for presetting k manually 1 And k 2 、m 1 And m 2 、n 1 And n. The display module 8 is used for displaying the fault type output by the central processing unit 7.
Example III
A third embodiment of the present application further provides a computer readable storage medium, which may be a computer readable storage medium contained in the apparatus described in the above embodiment; or may be a computer-readable storage medium, alone, that is not assembled into a device. The computer readable storage medium stores one or more programs for use by one or more processors to perform the steps of a transformer conservator fault monitoring method of an embodiment.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the invention referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the invention. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (7)
1. A method for monitoring a fault of a transformer oil conservator, the method comprising the steps of:
acquiring an oil level y, wherein the oil level y is measured by an oil level gauge arranged in a transformer oil pillow;
acquiring a first pressure p 1 The first pressure p 1 Pressure data measured by a pressure gauge arranged in an oil tank of the transformer body;
obtaining a second pressure p 2 The second pressure p 2 Pressure data measured by a pressure gauge arranged at a transformer oil conservator;
acquiring a temperature t, wherein the temperature t is measured by a thermometer arranged in a transformer oil pillow;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a being a set constant;
determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
according to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values;
according to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values;
according to the standard second pressure P 20 Determining a second pressure lower limit n 1 *P 20 And a second upper pressure limit value n 2 *P 20 ，n 1 <n 2 ；n 1 And n 2 Are set values;
setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 Inputting a fault judgment model to obtain a fault judgment result;
the fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) And outputting a fault judgment result to be that the corrugated pipe is jammed at the high oil level position.
2. The utility model provides a transformer oil pillow fault monitoring system which characterized in that: comprising
The data acquisition module is used for acquiring temperature current I measured by a thermometer at the transformer oil conservator t Oil level current I measured by an oil level gauge in a transformer oil conservator y First pressure current I measured by pressure gauge in oil tank of transformer body P1 And a second pressure current I measured by a pressure gauge at the transformer oil conservator P2 ；
A current conversion module for converting the temperature current I measured by the thermometer t Converting to temperature t, and discharging oil level current I y Converting to oil level y, and converting the first pressure current I P1 Converting to a first pressure P1, and converting the second pressure current I P2 Converting to a second pressure P2;
a central processing unit for:
receiving the temperature t, the oil level y, the first pressure P1 and the second pressure P2 sent by the current conversion module;
determining a standard oil level y corresponding to the temperature t according to the following formula (1) 0 ：
y 0 =kt+a (1), k, a is the set constantA number;
determining a standard first pressure P corresponding to said temperature t according to the following equation (2) 10 ：
P 10 =mt+b (2), m, b being a set constant;
determining a standard second pressure P corresponding to said temperature t according to the following equation (3) 20 ：
P 20 =nt+c (3), n, c being a set constant;
according to standard oil level y 0 Determining a lower limit k of the oil level 1 *y 0 And an upper limit value k of the oil level 2 *y 0 ，k 1 <k 2 ；k 1 And k 2 Are set values;
according to the standard first pressure P 10 Determining a first pressure lower limit value m 1 *P 10 And a first pressure upper limit value m 2 *P 10 ，m 1 <m 2 ；m 1 And m 2 Are set values;
according to the standard second pressure P 20 Determining a second pressure lower limit n 1 *P 20 And a second upper pressure limit value n 2 *P 20 ，n 1 <n2；n 1 And n2 are set values;
setting the first pressure p 1 Second pressure p 2 Oil level y, oil level lower limit value k 1 *y 0 Upper limit value k of oil level 2 *y 0 First pressure lower limit value m 1 *P 10 First pressure upper limit value m 2 *P 10 A second pressure lower limit value n 1 *P 20 Upper limit value of second pressure n 2 *P 20 Inputting a fault judgment model to obtain a fault judgment result;
the fault judgment model has the following judgment conditions:
judgment of p 2 ≤n 1 p 20 Or p 2 ≥n 2 p 20 Outputting a fault judgment result to be that the respirator is blocked;
judging that y is greater than or equal to k 2 y 0 ，p 1 ≥m 2 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is high;
judging y is less than or equal to k 1 y 0 ，p 1 ≤m 1 p 10 ,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the actual oil level is low;
judging that y is greater than or equal to k 2 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the air intake or the oil meter is damaged at a high oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ∈（m 1 p 10 ，m 1 p 10 ）,p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the oil meter is damaged at a low oil level position;
judging y is less than or equal to k 1 y 0 ，p 1 ≥m 2 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Outputting a fault judgment result to be that the corrugated pipe is jammed at a low oil level position;
judging when y is greater than or equal to k 2 y 0 ，p 1 ≤m 1 p 10 ，p 2 ∈（n 1 p 20 ，n 1 p 20 ) Output fault determination
The result is a stuck bellows in a high oil level position.
3. The transformer oil conservator fault monitoring system of claim 2, wherein: the current conversion module converts the temperature current I according to the following formula (4) t Conversion to temperature t:
（L a1 ,L a2 ) Is of variable pressureA measuring range of a thermometer at the oil conservator; (I) a1 ,I a2 ) For outputting the current thereof
Range.
4. The transformer oil conservator fault monitoring system of claim 2, wherein: the current conversion module converts the oil level current I according to the following formula (5) y Conversion to oil level y:
（L b1 ,L b2 ) The measuring range of the oil level gauge in the body oil tank; (I) b1 ,I b2 ) For its current output range
And (5) enclosing.
5. The transformer oil conservator fault monitoring system of claim 2, wherein:
the current conversion module converts the first pressure current I according to the following formula (6) P1 Is converted into a first pressure p 1 ：
（L c1 ,L c2 ) The measuring range of the pressure gauge in the oil tank of the body is; (I) c1 ,I c2 ) For its current output range.
6. The transformer oil conservator fault monitoring system of claim 2, wherein:
the current conversion module converts the second pressure current I according to the following formula (7) P2 Is converted into a second pressure p 2 ：
（L d1 ,L d2 ) The measuring range of the pressure gauge in the respirator of the conservator is; (I) d1 ,I d2 ) For its current
And outputting the range.
7. A computer storage medium having a computer program, characterized in that the computer program when executed by a processor implements the steps of the transformer oil conservator fault monitoring method of claim 1.
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| CN110207784A (en) * | 2019-07-12 | 2019-09-06 | 国家电网有限公司 | Transformer oil level alarm method, device and terminal device |
| CN111006741A (en) * | 2019-12-25 | 2020-04-14 | 中国南方电网有限责任公司超高压输电公司广州局 | Oil level abnormity detection method and system for oil-immersed transformer body |
| CN113658784A (en) * | 2021-08-09 | 2021-11-16 | 南京力通达电气技术有限公司 | Intelligent oil level abnormity monitoring device and monitoring method for transformer |
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| US8400320B2 (en) * | 2009-12-30 | 2013-03-19 | Eduardo Pedrosa Santos | System for monitoring oil level and detecting leaks in power transformers, reactors, current and potential transformers, high voltage bushings and the like |
| US9442150B2 (en) * | 2011-12-16 | 2016-09-13 | Virginia Transformer Corporation | System and method for monitoring and controlling a transformer |
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| CN110207784A (en) * | 2019-07-12 | 2019-09-06 | 国家电网有限公司 | Transformer oil level alarm method, device and terminal device |
| CN111006741A (en) * | 2019-12-25 | 2020-04-14 | 中国南方电网有限责任公司超高压输电公司广州局 | Oil level abnormity detection method and system for oil-immersed transformer body |
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