CN117192310A - Online monitoring method, system and medium for partial discharge of high-voltage sleeve - Google Patents

Abstract

The invention discloses an online monitoring method, system and medium for partial discharge of high-voltage bushings; it relates to the field of online monitoring technology; ultrasonic signals and high-frequency pulse current signals of high-voltage bushings are collected and pre-processed to obtain spectrum characteristic information and discharge characteristic information; The credibility analysis is then performed to obtain the discharge monitoring results; the present invention realizes online monitoring of the partial discharge of the high-voltage bushing in the substation through the collection and analysis of high-frequency pulse current signals and ultrasonic signals, using spectrum characteristic information and discharge characteristic information as respectively The partial discharge judgment basis not only facilitates real-time collection and measurement, but also performs partial discharge judgment from two different dimensions. Finally, the judgment results of the two different dimensions are combined and the discharge monitoring results of the high-voltage sleeve are obtained after credibility analysis. The purpose of real-time collection and analysis of casing operating data is to ultimately achieve early warning of casing electrical faults.

Description

An online monitoring method, system and medium for partial discharge of high-voltage bushings

Technical field

The invention relates to the field of online monitoring technology, and specifically relates to an online monitoring method, system and medium for partial discharge of high-voltage bushings.

Background technique

Transformers, reactors, current transformers and other power equipment all use high-voltage bushings. During long-term operation, there may be hidden dangers inside due to aging, vibration and other factors. Monitoring and analyzing the partial discharge of bushings can detect possible hidden dangers in high-voltage bushings in advance and avoid the development of defects and the occurrence of failures.

The traditional measurement of partial discharge of high-voltage bushings uses power outage measurement, which cannot detect whether there is partial discharge in the bushing in real time and timely. Since the power outage test cannot fully reflect the status of the bushing in operation, the measurement results of the power outage test have certain deviations.

Contents of the invention

The technical problem to be solved by this invention is: the traditional measurement of partial discharge of high-voltage bushings adopts the method of power outage measurement, which cannot detect whether there is partial discharge in the bushing in real time and timely, and because the power outage test cannot fully reflect the status of the bushing in operation, There is a certain deviation in the measurement results of the power outage test. The purpose of the present invention is to provide an online monitoring method, system and medium for high-voltage bushing partial discharge, and to improve the method on the existing high-voltage bushing partial discharge measurement technology. Through the analysis of high-frequency pulse current signals and ultrasonic signals, the partial discharge of high-voltage bushings in the substation can be monitored online to achieve the purpose of real-time collection and analysis of bushing operation data, and ultimately achieve early warning of bushing electrical faults.

The present invention is realized through the following technical solutions:

The invention provides an online monitoring method for partial discharge of high-voltage bushings, which includes:

Collect ultrasonic signals and high-frequency pulse current signals from high-voltage sleeves;

Perform first preprocessing on the ultrasonic signal to obtain spectrum characteristic information, and perform second preprocessing on the high-frequency pulse current signal to obtain discharge characteristic information;

Partial discharge determination is performed based on spectrum characteristic information and discharge characteristic information respectively;

First, the credibility analysis is performed on the partial discharge judgment results of the spectrum characteristic information and the partial discharge judgment results of the discharge characteristic information respectively, and then a comprehensive credibility analysis is performed to obtain the discharge monitoring results of the high-voltage sleeve.

Working principle of this scheme: The traditional measurement of partial discharge of high-voltage bushings adopts the method of power outage measurement, which cannot detect whether there is partial discharge in the bushing in real time and timely. Moreover, since the power outage test cannot fully reflect the status of the bushing in operation, the measurement of the power outage test cannot be fully reflected. There is a certain deviation in the results; the purpose of the present invention is to provide an online monitoring method, system and medium for high-voltage bushing partial discharge, and improve the method on the existing high-voltage bushing partial discharge measurement technology, through high-frequency pulse The collection and analysis of current signals and ultrasonic signals enables online monitoring of partial discharges in high-voltage bushings in substations. Spectrum characteristic information and discharge characteristic information are used as the basis for partial discharge determination. This not only facilitates real-time collection and measurement, but also distinguishes between two different Partial discharge judgment is carried out in different dimensions, and finally the judgment results of two different dimensions are combined to obtain the discharge monitoring results of the high-voltage bushing after credibility analysis, so as to achieve the purpose of real-time collection and analysis of bushing operation data, so as to finally realize the bushing Early warning of electrical failure.

A further optimization plan is to collect the ultrasonic signal and high-frequency pulse current signal of the high-voltage sleeve, including the method:

An ultrasonic sensor and a high-frequency pulse current sensor are installed at the end screen of the high-voltage casing to collect ultrasonic signals and high-frequency pulse current signals when the high-voltage casing is running. For the extraction of partial discharge signals in complex operating environments, a combined acoustic-electrical method is used for dual measurements. At the same time, by directly measuring and then processing the data, the problem of signal distortion can be effectively avoided.

A further optimization solution is to perform the first preprocessing on the ultrasonic signal to obtain the spectrum characteristic information, and perform the second preprocessing on the high frequency pulse current signal to obtain the discharge characteristic information; including the method:

For ultrasonic signals, divide the frequency range into N frequency intervals and calculate the spectrum area of the ultrasonic signal in each frequency interval;

For the high-frequency pulse current signal, the discharge characteristic parameters are calculated according to the high-frequency pulse current signal, and the discharge characteristic parameters include: apparent discharge amount, discharge phase and number of discharges.

A further optimization solution is to perform partial discharge determination based on spectrum characteristic information and discharge characteristic information, including methods:

For spectral feature information:

Obtain the preset spectrum areas corresponding to N frequency intervals, and calculate the ratio S of the spectrum area of the ultrasonic signal in each frequency interval to the corresponding preset spectrum area;

Determine whether the ratio S exceeds the ratio threshold S _y , and count the number Len of ratios exceeding the ratio threshold S _y ;

Judging based on the size of Len:

When Len<1, the partial discharge judgment result is no partial discharge;

When Len≥1, the partial discharge judgment result is possible partial discharge.

A further optimization solution is to perform partial discharge determination based on spectrum characteristic information and discharge characteristic information, including methods:

For discharge characteristic information:

Compare the apparent discharge amount with the discharge amount threshold H: when the apparent discharge amount is less than the discharge amount threshold H, the partial discharge determination result is no partial discharge; when the apparent discharge amount exceeds the discharge amount threshold H, the partial discharge determination result is possible Partial Discharge.

A further optimization plan is to conduct a credibility analysis on the partial discharge determination results of the spectrum feature information, including methods:

The discharge credibility is divided into 4 levels: the first degree, the second degree, the third degree and the fourth degree. The possibility of discharge at the 4 levels increases in order; the credibility of the first degree is 0.25 , the second degree of credibility is 0.5, the third degree of credibility is 0.75 and the fourth degree of credibility is 0.95;

When the partial discharge judgment result is possible partial discharge, judge Len:

When 1≤Len<Thr/3, the discharge credibility of the current partial discharge determination result belongs to the first level;

When Thr/3≤Len<2Thr/3, the discharge credibility of the current partial discharge determination result belongs to the second level;

When 2Thr/3≤Len<Thr, the discharge credibility of the current partial discharge determination result belongs to the third level;

When Len>Thr, the discharge credibility of the current partial discharge determination result belongs to the fourth level; Thr is the number threshold.

A further optimization plan is to conduct a credibility analysis on the partial discharge determination results of the discharge characteristic information, including methods:

When the partial discharge determination result is possible partial discharge, obtain the apparent discharge amount Q, discharge phase and discharge number N of the high-frequency pulse current signal;

Then the credibility CF ₂ of the partial discharge judgment result is:

In the formula, P _Q and P _N are the discharge possibilities obtained based on the apparent discharge amount Q and the number of discharges N respectively, 0≤P _Q ≤1, 0≤P _N ≤1; λ1 and λ2 are weights, and λ1+λ2 =1,

A further optimization plan is the comprehensive credibility analysis, including methods:

Obtain the credibility analysis result CF ₁ of the spectrum characteristic information and the credibility analysis result CF ₂ of the discharge characteristic information;

Calculate the comprehensive credibility of partial discharge CF ₁₂ : CF ₁₂ = CF ₁ + CF ₂ - CF ₁ * CF ₂

When CF ₁₂ ≤0.15, the discharge monitoring result is no partial discharge;

When 0.15＜CF ₁₂ ≤0.4, the discharge monitoring result is that the possibility of partial discharge is small;

When 0.4＜CF ₁₂ ≤0.8, the discharge monitoring result is that the possibility of partial discharge is average;

When 0.8＜CF ₁₂ ≤0.95, the discharge monitoring result is that partial discharge is highly likely;

When 0.95<CF ₁₂ , the discharge monitoring result is partial discharge.

This solution also provides an online monitoring system for high-voltage bushing partial discharge, which is used to implement the above-mentioned online monitoring method for high-voltage bushing partial discharge, including:

Acquisition module, used to collect ultrasonic signals and high-frequency pulse current signals of high-voltage sleeves;

A preprocessing module, used to perform first preprocessing on the ultrasonic signal to obtain spectrum characteristic information, and perform second preprocessing on the high-frequency pulse current signal to obtain discharge characteristic information;

A determination module used to determine partial discharge based on spectrum characteristic information and discharge characteristic information respectively;

The credibility analysis module is used to first conduct credibility analysis on the partial discharge determination results of the spectrum feature information and the partial discharge determination results of the discharge feature information, and then conduct a comprehensive credibility analysis to obtain the high-voltage jacket discharge monitoring results.

This solution also provides a computer-readable medium on which a computer program is stored. The computer program is executed by a processor to implement the above-mentioned online monitoring method for partial discharge of high-voltage bushings.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The invention provides an online monitoring method, system and medium for partial discharge of high-voltage bushings; on the existing measurement technology of partial discharge of high-voltage bushings, method improvements are made, and through the measurement of high-frequency pulse current signals and ultrasonic signals Collection and analysis realize online monitoring of partial discharge of high-voltage bushings in substations. Spectrum characteristic information and discharge characteristic information are used as the basis for partial discharge determination. This not only facilitates real-time collection and measurement, but also makes partial discharge determination from two different dimensions. , finally combining the judgment results of two different dimensions, and obtaining the discharge monitoring results of the high-voltage bushing after credibility analysis, achieving the purpose of real-time collection and analysis of bushing operation data, and finally realizing early warning of bushing electrical faults.

Description of the drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts. In the attached picture:

Figure 1 is a schematic flow chart of the online monitoring method for high-voltage bushing partial discharge;

Figure 2 is a schematic diagram of the assembly structure of the acquisition module;

Figure 3 is a schematic diagram of the online monitoring system for partial discharge of high-voltage bushings.

Marks and corresponding parts names in the attached drawings:

1-Sealing ring, 2-Last screen shield, 6-Ultrasonic sensor, 7-, 8-,.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples and drawings. The schematic embodiments of the present invention and their descriptions are only used to explain the present invention and do not as a limitation of the invention.

Example 1

This embodiment provides an online monitoring method for partial discharge of high-voltage bushings, as shown in Figure 1, including:

Step 1: Collect the ultrasonic signal and high-frequency pulse current signal of the high-voltage sleeve;

Collect ultrasonic signals and high-frequency pulse current signals from high-voltage sleeves, including methods:

As shown in Figure 2, at the end of the high-voltage casing, the end of the sealing ring 1 is connected to the end screen shield 2 of the high-voltage casing.

An ultrasonic sensor 6 and a high-frequency pulse current sensor 7 are installed in the high-voltage casing end screen shield 2. A high-frequency pulse current signal aviation plug 4 and an ultrasonic signal aviation plug 5 are provided at the end of the high-voltage casing end screen shield 2. The ultrasonic sensor 6 collects the ultrasonic signal when the high-voltage bushing is running and outputs it through the ultrasonic signal aviation plug 5 . The high-frequency pulse current signal collected by the high-frequency pulse current sensor 7 is output through the high-frequency pulse current signal aviation plug 4 .

Step 2: Perform the first preprocessing on the ultrasonic signal to obtain the spectrum characteristic information, perform the second preprocessing on the high-frequency pulse current signal to obtain the discharge characteristic information; perform the first preprocessing on the ultrasonic signal to obtain the spectrum characteristic information, and perform the second preprocessing on the high-frequency pulse current signal to obtain the spectrum characteristic information. The signal is subjected to a second preprocessing to obtain discharge characteristic information; including methods:

For ultrasonic signal filtering, separation and amplification processing, the frequency range is divided into N frequency intervals, and the spectrum area of the ultrasonic signal in each frequency interval is calculated;

For high-frequency pulse current signal filtering and separation detection processing, discharge characteristic parameters are calculated according to the high-frequency pulse current signal. The discharge characteristic parameters include: apparent discharge amount, discharge phase and discharge number.

Step 3: Make partial discharge determination based on spectrum characteristic information and discharge characteristic information respectively;

Partial discharge determination based on spectrum characteristic information and discharge characteristic information includes methods:

For spectral feature information:

Obtain the preset spectrum areas corresponding to N frequency intervals, and calculate the ratio S of the spectrum area of the ultrasonic signal in each frequency interval to the corresponding preset spectrum area;

Determine whether the ratio S exceeds the ratio threshold S _y , and count the number Len of ratios exceeding the ratio threshold S _y ;

Judging based on the size of Len:

When Len<1, the partial discharge judgment result is no partial discharge;

When Len≥1, the partial discharge judgment result is possible partial discharge.

For discharge characteristic information:

Compare the apparent discharge amount with the discharge amount threshold H: when the apparent discharge amount is less than the discharge amount threshold H, the partial discharge determination result is no partial discharge; when the apparent discharge amount exceeds the discharge amount threshold H, the partial discharge determination result is possible Partial Discharge.

Step 4: First perform a credibility analysis on the partial discharge determination results of the spectrum feature information and the partial discharge determination results of the discharge feature information, and then perform a comprehensive credibility analysis to obtain the discharge monitoring results of the high-voltage jacket.

Conduct credibility analysis on the partial discharge determination results of spectrum characteristic information, including methods:

The discharge credibility is divided into 4 levels: the first degree, the second degree, the third degree and the fourth degree. The possibility of discharge at the 4 levels increases in order; the credibility of the first degree is 0.25 , the second degree of credibility is 0.5, the third degree of credibility is 0.75 and the fourth degree of credibility is 0.95;

When the partial discharge judgment result is possible partial discharge, judge Len:

When 1≤Len<Thr/3, the discharge credibility of the current partial discharge determination result belongs to the first level; the credibility is small, and the credibility value is 0.25;

When Thr/3≤Len<2Thr/3, the discharge credibility of the current partial discharge determination result belongs to the second level; the credibility is average, and the credibility value is 0.5;

When 2Thr/3≤Len<Thr, the discharge credibility of the current partial discharge determination result belongs to the third degree; the credibility is large, and the credibility value is 0.75;

When Len>Thr, the discharge credibility of the current partial discharge determination result belongs to the fourth degree; the credibility is almost certain, and the credibility value is 0.95; Thr is the number threshold.

Conduct credibility analysis on partial discharge determination results of discharge characteristic information, including methods:

When the partial discharge determination result is possible partial discharge, obtain the apparent discharge amount Q, discharge phase and discharge number N of the high-frequency pulse current signal;

Then the credibility CF ₂ of the partial discharge judgment result is:

In the formula, P _Q and P _N are the discharge possibilities obtained based on the apparent discharge amount Q and the number of discharges N respectively, 0≤P _Q ≤1, 0≤P _N ≤1; λ1 and λ2 are weights, and λ1+λ2 =1,

Comprehensive credibility analysis, including methods:

Obtain the credibility analysis result CF ₁ of the spectrum characteristic information and the credibility analysis result CF ₂ of the discharge characteristic information;

Calculate the comprehensive credibility of partial discharge CF ₁₂ : CF ₁₂ = CF ₁ + CF ₂ - CF ₁ * CF ₂

When CF ₁₂ ≤0.15, the discharge monitoring result is no partial discharge;

When 0.15＜CF ₁₂ ≤0.4, the discharge monitoring result is that the possibility of partial discharge is small;

When 0.4＜CF ₁₂ ≤0.8, the discharge monitoring result is that the possibility of partial discharge is average;

When 0.8＜CF ₁₂ ≤0.95, the discharge monitoring result is that partial discharge is highly likely;

When 0.95<CF ₁₂ , the discharge monitoring result is partial discharge.

Example 2

This embodiment provides an online monitoring system for partial discharge of high-voltage bushings, which is used to implement an online monitoring method for partial discharge of high-voltage bushings described in Embodiment 1, including:

Acquisition module, used to collect ultrasonic signals and high-frequency pulse current signals of high-voltage sleeves;

A preprocessing module, used to perform first preprocessing on the ultrasonic signal to obtain spectrum characteristic information, and perform second preprocessing on the high-frequency pulse current signal to obtain discharge characteristic information;

A determination module used to determine partial discharge based on spectrum characteristic information and discharge characteristic information respectively;

The credibility analysis module is used to first conduct credibility analysis on the partial discharge determination results of the spectrum feature information and the partial discharge determination results of the discharge feature information, and then conduct a comprehensive credibility analysis to obtain the high-voltage jacket discharge monitoring results.

The working principle of the online monitoring system for partial discharge of high-voltage bushings is shown in Figure 3. The ultrasonic signal is filtered, separated and amplified, and the high-frequency pulse current signal is filtered and separated and detected, and then the PC terminal performs partial discharge determination and credibility. Analyze and obtain the discharge monitoring results of the high-voltage jacket.

Example 3

This embodiment provides a computer-readable medium on which a computer program is stored. The computer program is executed by a processor to implement an online monitoring method for partial discharge of a high-voltage bushing as described in Embodiment 1.

The above-described specific embodiments further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above-mentioned are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. An on-line monitoring method for partial discharge of a high-voltage bushing is characterized by comprising the following steps:

collecting an ultrasonic signal and a high-frequency pulse current signal of a high-voltage sleeve;

performing first preprocessing on the ultrasonic signal to obtain frequency spectrum characteristic information, and performing second preprocessing on the high-frequency pulse current signal to obtain discharge characteristic information;

respectively carrying out partial discharge judgment based on the frequency spectrum characteristic information and the discharge characteristic information;

and respectively carrying out reliability analysis on the partial discharge judgment result of the frequency spectrum characteristic information and the partial discharge judgment result of the discharge characteristic information, and then carrying out comprehensive reliability analysis to obtain a discharge monitoring result of the high-voltage sleeve.

2. The on-line monitoring method for partial discharge of a high-voltage bushing according to claim 1, wherein the collecting the ultrasonic signal and the high-frequency pulse current signal of the high-voltage bushing comprises the following steps:

an ultrasonic sensor and a high-frequency pulse current sensor are additionally arranged at the end screen position of the high-voltage sleeve, and an ultrasonic signal and a high-frequency pulse current signal are collected when the high-voltage sleeve operates.

3. The on-line monitoring method of partial discharge of a high-voltage bushing according to claim 1, wherein the first preprocessing is performed on an ultrasonic signal to obtain frequency spectrum characteristic information, and the second preprocessing is performed on a high-frequency pulse current signal to obtain discharge characteristic information; the method comprises the following steps:

for an ultrasonic signal, dividing a frequency range into N frequency intervals, and calculating the frequency spectrum area of the ultrasonic signal in each frequency interval;

for a high frequency pulse current signal, calculating a discharge characteristic parameter from the high frequency pulse current signal, the discharge characteristic parameter comprising: apparent discharge amount, discharge phase, and number of discharges.

4. The on-line monitoring method for partial discharge of a high voltage bushing according to claim 3, wherein the determining of partial discharge based on the spectral characteristic information and the discharge characteristic information comprises the steps of:

for spectral feature information:

acquiring preset frequency spectrum areas corresponding to N frequency intervals, and calculating the ratio S of the frequency spectrum area of the ultrasonic signal in each frequency interval to the corresponding preset frequency spectrum area;

judging whether the ratio S exceeds the ratio threshold S _y The statistical ratio exceeds the ratio threshold S _y Is the number Len of (2);

judging according to the size of Len:

when Len is less than 1, the partial discharge judgment result is that no partial discharge exists;

when Len is more than or equal to 1, the partial discharge judgment result is possible partial discharge.

5. The on-line monitoring method for partial discharge of a high voltage bushing according to claim 3, wherein the determining of partial discharge based on the spectral characteristic information and the discharge characteristic information comprises the steps of:

for discharge characteristic information:

comparing the apparent discharge amount with a discharge amount threshold H: when the apparent discharge quantity is smaller than the discharge quantity threshold value H, the partial discharge judgment result is that no partial discharge exists; when the apparent discharge amount exceeds the discharge amount threshold H, the partial discharge determination result is a possible partial discharge.

6. The on-line monitoring method of partial discharge of a high voltage bushing according to claim 4, wherein the reliability analysis of the partial discharge determination result of the spectral feature information comprises the steps of:

discharge reliability is divided into 4 degrees: the discharge probability of the first degree, the second degree, the third degree and the fourth degree increases in order of 4 degrees; wherein the first degree of confidence is 0.25, the second degree of confidence is 0.5, the third degree of confidence is 0.75 and the fourth degree of confidence is 0.95;

when the partial discharge determination result is that partial discharge is possible, determining Len:

when Len is more than or equal to 1 and less than Thr/3, the discharge reliability of the current partial discharge judgment result belongs to a first degree;

when Thr/3 is less than or equal to Len < 2Thr/3, the discharge reliability of the current partial discharge judgment result belongs to a second degree;

when 2Thr/3 is less than or equal to Len and less than Thr, the discharge reliability of the current partial discharge judgment result belongs to a third degree;

when Len > Thr, the discharge reliability of the current partial discharge judgment result belongs to a fourth degree; wherein Thr is a number threshold.

7. The on-line monitoring method of partial discharge of a high voltage bushing according to claim 5, wherein the reliability analysis of the partial discharge determination result of the discharge characteristic information comprises the steps of:

when the partial discharge judging result is that partial discharge is possible, acquiring apparent discharge quantity Q, discharge phase and discharge times N of the high-frequency pulse current signal;

reliability CF of partial discharge determination result ₂ The method comprises the following steps:

wherein P is _Q 、P _N The discharge probability is 0.ltoreq.P according to the apparent discharge quantity Q and the discharge times N _Q ≤1，0≤P _N Is less than or equal to 1; λ1 and λ2 are weights, and

8. the method for on-line monitoring of partial discharge of a high voltage bushing according to claim 1, wherein said integrated reliability analysis comprises the steps of:

credibility analysis result CF for obtaining frequency spectrum characteristic information ₁ And reliability analysis result CF of discharge characteristic information ₂ ；

Calculating the integrated reliability CF of partial discharge ₁₂ ：CF ₁₂ ＝CF ₁ +CF ₂ -CF ₁ *CF ₂

When CF is ₁₂ When the discharge monitoring result is less than or equal to 0.15, no partial discharge exists;

when 0.15 < CF ₁₂ When the discharge monitoring result is less than or equal to 0.4, the partial discharge possibility is low;

when 0.4 < CF ₁₂ When the discharge monitoring result is less than or equal to 0.8, the partial discharge possibility is common;

when 0.8 < CF ₁₂ When the discharge monitoring result is less than or equal to 0.95, the partial discharge possibility is high;

when 0.95 < CF ₁₂ The discharge monitoring result is partial discharge.

9. An on-line monitoring system for partial discharge of a high voltage bushing, characterized in that it is adapted to implement an on-line monitoring method for partial discharge of a high voltage bushing according to any one of claims 1-8, comprising:

the acquisition module is used for acquiring ultrasonic signals and high-frequency pulse current signals of the high-voltage sleeve;

the pretreatment module is used for carrying out first pretreatment on the ultrasonic signals to obtain frequency spectrum characteristic information and carrying out second pretreatment on the high-frequency pulse current signals to obtain discharge characteristic information;

the judging module is used for respectively carrying out partial discharge judgment based on the frequency spectrum characteristic information and the discharge characteristic information;

the reliability analysis module is used for respectively carrying out reliability analysis on the partial discharge judgment result of the frequency spectrum characteristic information and the partial discharge judgment result of the discharge characteristic information, and then carrying out comprehensive reliability analysis to obtain a high-voltage sleeve discharge monitoring result.

10. A computer readable medium having stored thereon a computer program, wherein the computer program is executed by a processor to implement an on-line monitoring method of partial discharge of a high voltage bushing according to any one of claims 1-8.