CN101702001A - Method and device for evaluating discharge severity of gas insulating combined electric equipment - Google Patents
Method and device for evaluating discharge severity of gas insulating combined electric equipment Download PDFInfo
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- CN101702001A CN101702001A CN200910238645A CN200910238645A CN101702001A CN 101702001 A CN101702001 A CN 101702001A CN 200910238645 A CN200910238645 A CN 200910238645A CN 200910238645 A CN200910238645 A CN 200910238645A CN 101702001 A CN101702001 A CN 101702001A
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Abstract
The invention discloses a method and a device for evaluating the discharge severity of gas insulating combined electric equipment. The method comprises the following steps of: detecting partial discharge of GIS equipment of the gas insulating combined electric equipment; converting the data of detected partial discharge into a map; comparing the map with a preset map database; and judging the severity of partial discharge of the GIS equipment. By adopting the invention, the reliability and the accuracy for evaluating the discharge severity of GIS equipment can be improved.
Description
Technical field
The present invention relates to field of electrical equipment, in particular to a kind of discharge severity appraisal procedure and device of gas insulated combined electric appliance equipment.
Background technology
Gas insulated combined electrical equipment (Gas Insulted Switchgear, abbreviating GIS as) floor area is little, maintenance workload is few, insulating property are good because of having, the reliability advantages of higher is widely used in the high voltage power transmission field, but inner because of it because the latency insulation defect that occurs in the manufacturing or the long-time running process still can also progressively enlarge by initiating failure, usually cause the generation of major accident.The most common electric fault feature of GIS is before insulate puncture fully or flashover shelf depreciation to take place.Shelf depreciation is not only the tendency and the form of expression of the apparatus insulated deterioration of GIS, and can cause the further deterioration of insulation, causes the electrical insulation properties of GIS to reduce, and finally causes insulation breakdown or edge flashing.Along with the continuous increase of line voltage grade and power system capacity, the internal fault of GIS equipment also increases thereupon, and it is particularly important therefore to seek the method for effectively assessing the GIS discharge severity.
The appraisal procedure of GIS discharge severity mainly is the size by the discharge amplitude in the correlation technique, carries out blind commenting according to historical data of being grasped or maintenance record in conjunction with experience again.But from the effect of reality, only be difficult to determine the order of severity of GIS discharge according to discharge amplitude size, the reliability of this appraisal procedure and accuracy are all very low.Therefore, seek the method for discharge severity identification and assessment, science, accuracy, the reliability that improves order of severity assessment is GIS internal state assessment problem anxious to be solved.
Appraisal procedure reliability and the lower problem of accuracy in the correlation technique GIS equipment being discharged do not propose effective solution at present as yet.
Summary of the invention
At in the correlation technique appraisal procedure reliability of GIS equipment discharge and the lower problem of accuracy being proposed the present invention, for this reason, fundamental purpose of the present invention is to provide a kind of discharge severity appraisal procedure and device of gas insulated combined electric appliance equipment, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of discharge severity appraisal procedure of gas insulated combined electric appliance equipment.
Discharge severity appraisal procedure according to gas insulated combined electric appliance equipment of the present invention comprises: the shelf depreciation to gas insulated combined electrical equipment GIS equipment detects; The data of detected shelf depreciation are converted to collection of illustrative plates; Collection of illustrative plates and the spectrum library of presetting are compared; Judge the order of severity of GIS apparatus local discharge according to result relatively.
Preferably, before the data with detected shelf depreciation were converted to collection of illustrative plates, this method also comprised: whether the detection sample number of judging the GIS apparatus local discharge is greater than predetermined threshold value; In judged result is under the situation that is, the data of shelf depreciation are converted to collection of illustrative plates.
Preferably, before detected data were converted to collection of illustrative plates, this method also comprised: judge according to the result who detects whether GIS equipment exists shelf depreciation; Do not exist at GIS equipment under the situation of shelf depreciation, continue the shelf depreciation of GIS equipment is detected.
Preferably, after judging the order of severity of GIS apparatus local discharge according to result relatively, this method also comprises: surpass under the situation of predetermined threshold value in the order of severity, then alarm.
Preferably, this collection of illustrative plates comprise following one of at least: scatter diagram, gray-scale map, histogram, three-dimensional plot and time frequency analysis figure.
Preferably, the shelf depreciation of GIS equipment is detected comprise and one of utilizing in the following detection method at least: pulse current detection method, superfrequency detection method, ultrasonic Detection Method and optical signal detecting method.
Preferably, each collection of illustrative plates all has pattern identification and discharge severity sign in the spectrum library.
Preferably, collection of illustrative plates and default spectrum library compared comprise: collection of illustrative plates and default spectrum library are compared, obtain the feature difference array of collection of illustrative plates and default spectrum library; Whether the minimum value in the judging characteristic difference array is less than the threshold value of setting; Under the situation of minimum value in the feature difference array less than the threshold value of setting, judge the order of severity of GIS apparatus local discharge according to result relatively.
To achieve these goals, according to a further aspect in the invention, provide a kind of discharge severity apparatus for evaluating of gas insulated combined electric appliance equipment.
Discharge severity apparatus for evaluating according to gas insulated combined electric appliance equipment of the present invention comprises: detection module is used for the shelf depreciation of gas insulated combined electrical equipment GIS equipment is detected; Modular converter is used for the data of detected shelf depreciation are converted to collection of illustrative plates; Comparison module is used for collection of illustrative plates and the spectrum library of presetting are compared; First judge module is used for judging according to result relatively the order of severity of GIS apparatus local discharge.
Preferably, device comprises: second judge module is used to judge that whether the detection sample number of GIS apparatus local discharge is greater than predetermined threshold value.
By the present invention, adopt shelf depreciation to detect to gas insulated combined electrical equipment GIS equipment; The data of detected shelf depreciation are converted to collection of illustrative plates; Collection of illustrative plates and the spectrum library of presetting are compared; Judge the order of severity of GIS apparatus local discharge according to result relatively, solve the appraisal procedure reliability and the lower problem of accuracy of in the correlation technique GIS equipment being discharged, and then reached the effect that improves GIS equipment discharge assessment reliability and accuracy.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram according to the discharge severity appraisal procedure of the gas insulated combined electric appliance equipment of the embodiment of the invention;
Fig. 2 is the process flow diagram according to the discharge severity appraisal procedure of the preferred gas insulated combined electric appliance equipment of the embodiment of the invention;
Fig. 3 is the synoptic diagram according to the discharge severity apparatus for evaluating of the gas insulated combined electric appliance equipment of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
According to embodiments of the invention, provide a kind of discharge severity appraisal procedure of gas insulated combined electric appliance equipment.
Fig. 1 is the process flow diagram according to the discharge severity appraisal procedure of the gas insulated combined electric appliance equipment of the embodiment of the invention.
As shown in Figure 1, this method comprises that following step S102 is to step S108:
Step S102 detects the shelf depreciation of gas insulated combined electrical equipment GIS equipment;
Step S104 is converted to collection of illustrative plates with the data of detected shelf depreciation;
Step S106 compares collection of illustrative plates and the spectrum library of presetting;
Step S108 judges the order of severity of GIS apparatus local discharge according to result relatively.
Preferably, before the data with detected shelf depreciation were converted to collection of illustrative plates, this method also comprised: whether the detection sample number of judging the GIS apparatus local discharge is greater than predetermined threshold value; In judged result is under the situation that is, the data of shelf depreciation are converted to collection of illustrative plates.By this method, can just change detecting under the enough big situation of sample number, thereby can make collection of illustrative plates after the conversion can reflect the order of severity of shelf depreciation more accurately.
Preferably, before detected data were converted to collection of illustrative plates, this method also comprised: judge according to the result who detects whether GIS equipment exists shelf depreciation; Do not exist at GIS equipment under the situation of shelf depreciation, continue the shelf depreciation of GIS equipment is detected.
Preferably, after judging the order of severity of GIS apparatus local discharge according to result relatively, this method also comprises: surpass under the situation of predetermined threshold value in the order of severity, then alarm.By this method, compare under the serious situation at the GIS apparatus local discharge, can help the user and recognize timely.
Preferably, this collection of illustrative plates comprise following one of at least: scatter diagram, gray-scale map, histogram, three-dimensional plot and time frequency analysis figure.
Preferably, the shelf depreciation of GIS equipment is detected comprise and one of utilizing in the following detection method at least: pulse current detection method, superfrequency detection method, ultrasonic Detection Method and optical signal detecting method.
Preferably, each collection of illustrative plates all has pattern identification and discharge severity sign in the spectrum library.Thereby, can assess the discharge severity of GIS equipment more accurately.
Preferably, collection of illustrative plates and default spectrum library compared comprise: collection of illustrative plates and default spectrum library are compared, obtain the feature difference array of collection of illustrative plates and default spectrum library; Whether the minimum value in the judging characteristic difference array is less than the threshold value of setting; Under the situation of minimum value in the feature difference array less than the threshold value of setting, judge the order of severity of GIS apparatus local discharge according to result relatively.
Preferably, the order of severity standard that each collection of illustrative plates in above-mentioned default spectrum library is corresponding different respectively, in the present invention, when collection of illustrative plates is compared with the spectrum library of presetting, can judge by the collection of illustrative plates after the data-switching of shelf depreciation more close with which collection of illustrative plates in the spectrum library, thereby can access the order of severity value of the collection of illustrative plates correspondence after the data-switching.
Be described in detail below in conjunction with the implementation procedure of example the embodiment of the invention.
The detection method purpose of gas insulated combined electric appliance equipment of the present invention provides a kind of evaluating system of gas insulated combined electrical equipment discharge severity, with the science that realizes GIS device interior state, accurate, reliable assessment.
Fig. 2 is the process flow diagram according to the discharge severity appraisal procedure of the preferred gas insulated combined electric appliance equipment of the embodiment of the invention.
As shown in Figure 2, this method comprises the steps;
Step S202, Partial Discharge Detection or monitoring device are installed on GIS equipment, wherein, Partial Discharge Detection or monitoring device are meant the GIS Partial Discharge Detection equipment that utilizes pulse current method, superfrequency method, supercritical ultrasonics technology or optical signal detecting method, preferably, select to install superfrequency (UHF) local discharge detection device.
Step S204 detects or monitors the shelf depreciation of GIS equipment.
With the superfrequency detection method is example, and operating GIS device interior is filled with hyperbar SF6 gas, and its dielectric strength and breakdown field strength are all very high.When part discharge took place in very little scope, the gas breakdown process was very fast, will produce very steep pulse current, and pulse to around the superfrequency electromagnetic wave that gives off.At insulator and flange connections, the electromagnetic wave signal of GIS inside can if sensor is placed the GIS outside, and be close to the insulator external diameter to external radiation, thereby can receive the superfrequency electromagnetic wave signal, can realize the long term monitoring of GIS apparatus local discharge or detection in short-term with this.
Step S206 judges whether GIS equipment exists shelf depreciation, if exist shelf depreciation to change step S208 over to, if there is no then returns step S204.
Step S208, whether the sample number of the GIS apparatus local discharge that judge to obtain meets the demands, and preferably, whether 〉=2000 the sample number of judging the GIS apparatus local discharge changes step S210 over to if meet the demands, if satisfied then return step S208.
Step S210, the shelf depreciation data that step S208 is obtained are converted to collection of illustrative plates, and compare by specific collection of illustrative plates alignment algorithm with data in the GIS discharge severity spectrum library, wherein, collection of illustrative plates is meant scatter diagram, gray-scale map, histogram, three-dimensional plot or time frequency analysis figure (TF figure) or above-mentioned combination, preferably, adopt edge detection algorithm to compare, calculate both feature difference arrays.
With
Histogram is an example, with the discharge phase in the shelf depreciation data
Q extracts with discharge capacity, if a power frequency period (360 °) is divided into several phase window, then j phase window
Interior total discharge capacity q
JtotalFor:
Wherein, the power frequency period sum of M for detecting, n
JsBe that s cycle is in phase window
Interior discharge time, q
JsiBe that s sense cycle is in phase window
The discharge capacity of interior the i time discharge.With q
TotalBe considered as
Function, and, can make with histogram graph representation
Histogram.
Among this method embodiment, the feature difference array is meant according to what different collection of illustrative plates alignment algorithms obtained waits to estimate the poor of a certain collection of illustrative plates eigenwert array in collection of illustrative plates eigenwert array and the spectrum library; GIS discharge severity spectrum library is meant the aggregate that can represent GIS equipment typical case discharge different stages of development collection of illustrative plates that obtains by a large amount of laboratory tests and field operation experiences, and each collection of illustrative plates is all with the sign of detailed pattern identification and discharge severity.
Step S212, whether the minimum value in the difference array that determining step S210 obtains is less than credible threshold value T, and preferably, this credible threshold setting is 0.25, if less than credible threshold value T then change step S214 over to, if greater than would return the discharge severity assessment that step S204 carries out a new round.
Step S214 carries out the assessment and the early warning of GIS discharge severity according to corresponding charts in the pairing spectrum library of the minimum value in the difference array.
Preferably, the detection method of above-mentioned preferred gas insulated combined electric appliance equipment according to the embodiment of the invention can be finished by a device, also can finish jointly by multiple arrangement.
From above description, as can be seen, the invention provides a kind of appraisal procedure that can assess the GIS discharge severity accurately, reliably, thereby, reached the effect that improves GIS equipment discharge assessment reliability and accuracy for the assessment that utilizes shelf depreciation to carry out GIS equipment discharge severity provides foundation.
According to embodiments of the invention, provide a kind of discharge severity apparatus for evaluating of gas insulated combined electric appliance equipment.
Need to prove, can in computer system, carry out in the step shown in the process flow diagram of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Fig. 3 is the synoptic diagram according to the discharge severity apparatus for evaluating of the gas insulated combined electric appliance equipment of the embodiment of the invention.
As shown in Figure 3, this device comprises: detection module 301, modular converter 303, comparison module 305 and first judge module 307.
Wherein, detection module 301 is used for the shelf depreciation of gas insulated combined electrical equipment GIS equipment is detected; Modular converter 303 is used for the data of detected shelf depreciation are converted to collection of illustrative plates; Comparison module 305 is used for described collection of illustrative plates and the spectrum library of presetting are compared; First judge module 307 is used for judging according to the result of described comparison the order of severity of described GIS apparatus local discharge.
Preferably, this pick-up unit also comprises: second judge module 309.
Wherein, second judge module 309 is used to judge that whether the detection sample number of described GIS apparatus local discharge is greater than predetermined threshold value.
Preferably, in the present invention, above-mentioned each module can be arranged in a device, also can lay respectively at different devices.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the discharge severity appraisal procedure of a gas insulated combined electric appliance equipment is characterized in that, comprising:
Shelf depreciation to gas insulated combined electrical equipment GIS equipment detects;
The data of detected shelf depreciation are converted to collection of illustrative plates;
Described collection of illustrative plates and the spectrum library of presetting are compared;
Judge the order of severity of described GIS apparatus local discharge according to the result of described comparison.
2. method according to claim 1 is characterized in that, before the data with detected shelf depreciation were converted to collection of illustrative plates, described method also comprised:
Whether the detection sample number of judging described GIS apparatus local discharge is greater than predetermined threshold value;
In judged result is under the situation that is, the data of described shelf depreciation are converted to collection of illustrative plates.
3. method according to claim 1 is characterized in that, before detected data were converted to collection of illustrative plates, described method also comprised:
Result according to described detection judges whether described GIS equipment exists shelf depreciation;
Do not exist under the situation of shelf depreciation at described GIS equipment, continue the shelf depreciation of described GIS equipment is detected.
4. method according to claim 1 is characterized in that, after the result according to described comparison judged the order of severity of described GIS apparatus local discharge, described method also comprised:
Surpass under the situation of predetermined threshold value in the described order of severity, then alarm.
5. according to each described method in the claim 1 to 4, it is characterized in that, described collection of illustrative plates comprise following one of at least:
Scatter diagram, gray-scale map, histogram, three-dimensional plot and time frequency analysis figure.
6. according to each described method in the claim 1 to 4, it is characterized in that, the shelf depreciation of GIS equipment is detected comprise and one of utilizing in the following detection method at least:
Pulse current detection method, superfrequency detection method, ultrasonic Detection Method and optical signal detecting method.
7. according to each described method in the claim 1 to 4, it is characterized in that each collection of illustrative plates all has pattern identification and discharge severity sign in the described spectrum library.
8. according to each described method in the claim 1 to 4, it is characterized in that, described collection of illustrative plates and default spectrum library are compared comprise:
Described collection of illustrative plates and default spectrum library are compared, obtain the feature difference array of described collection of illustrative plates and default spectrum library;
Judge that minimum value in the described feature difference array is whether less than the threshold value of setting;
Under the situation of minimum value in described feature difference array less than the threshold value of setting, judge the order of severity of described GIS apparatus local discharge according to the result of described comparison.
9. the discharge severity apparatus for evaluating of a gas insulated combined electric appliance equipment is characterized in that, comprising:
Detection module is used for the shelf depreciation of gas insulated combined electrical equipment GIS equipment is detected;
Modular converter is used for the data of detected shelf depreciation are converted to collection of illustrative plates;
Comparison module is used for described collection of illustrative plates and the spectrum library of presetting are compared;
First judge module is used for judging according to the result of described comparison the order of severity of described GIS apparatus local discharge.
10. device according to claim 9 is characterized in that, described device comprises:
Second judge module is used to judge that whether the detection sample number of described GIS apparatus local discharge is greater than predetermined threshold value.
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| CN200910238645A CN101702001A (en) | 2009-12-07 | 2009-12-07 | Method and device for evaluating discharge severity of gas insulating combined electric equipment |
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| CN102023278A (en) * | 2010-07-16 | 2011-04-20 | 华北电力大学 | Method and device for identifying partial discharge interference of GIS equipment |
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| CN103140766A (en) * | 2010-07-26 | 2013-06-05 | 普睿司曼股份公司 | Apparatus and method for monitoring an electric power transmission system through partial discharges analysis |
| CN103176113A (en) * | 2013-04-02 | 2013-06-26 | 国家电网公司 | Gas insulated switchgear (GIS) partial discharge calibration method and system |
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| CN106707114A (en) * | 2016-11-22 | 2017-05-24 | 华北电力大学 | Method and device for detecting operation states of GIS Intervals |
| CN106771902A (en) * | 2016-11-30 | 2017-05-31 | 国网江苏省电力公司南京供电公司 | A kind of determination method of GIS corona discharges degree |
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| CN109001602B (en) * | 2018-08-20 | 2020-07-28 | 广东工业大学 | Partial discharge severity evaluation method based on extreme learning machine algorithm |
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| CN112505501A (en) * | 2020-11-20 | 2021-03-16 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Partial discharge severity grade judging and early warning method based on electroacoustic combination |
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| CN112505501B (en) * | 2020-11-20 | 2022-07-26 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Partial discharge severity grade judging and early warning method based on electroacoustic combination |
| CN112505500B (en) * | 2020-11-20 | 2022-07-26 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Partial discharge severity evaluation method based on ultrahigh frequency detection mode |
| CN112990655A (en) * | 2021-02-03 | 2021-06-18 | 中国长江电力股份有限公司 | GIS equipment partial discharge danger degree evaluation algorithm |
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