scholarly journals STUDY AND PERFORMANCE OF PARTIAL DISCHARGE OF MODEL FOR DIFFERENT TYPE INSULATION MATERIALS WITH CAPACITANCE VALUE

2021 ◽  
Vol 8 (12) ◽  
pp. 323-327
Author(s):  
Neetu Baghelkar ◽  
Abhishek Dubey
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Partial Discharge ◽  
Electrical Equipment ◽  
Partial Discharges ◽  
Electrical System ◽  
Insulating Material ◽  
Different Types ◽  
And Performance ◽  
Short Time

The properties of the insulating material must be the best to avoid failure of electrical equipment. Partial discharges act as electrical sparks that occur within insulation and the high-voltage electrical system. The different types of voltage and current pulses are produced, which last for a very short time. Partial discharge is taking place in high voltage power equipment such as cables, transmission lines and transformers, etc.

scholarly journals STUDY AND SIMULATION OF PARTIAL DISCHARGE OF DIFFERENT INSULATORS

2018 ◽  
Vol 6 (12) ◽  
pp. 135-139
Author(s):  
Khushboo Patareya ◽  
Arun Pachori
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Partial Discharges ◽  
Insulating Material ◽  
Insulation Failure

In this paper, we are studying about partial discharge of insulator with various parameters simulated in MATLAB. There are many types of insulator available in markets which have some impurities. The partial discharges are occurred due to presence of air impurity or void in the insulating material. The insulation failure occurs in high voltage power equipment’s due to Partial discharges, which readily generates at void or rough conductor profiles of equipment’s.

scholarly journals Device for online monitoring of insulation faults in high-voltage switchgears

2021 ◽  
Vol 17 (2) ◽  
pp. 155014772199928
Author(s):  
Jiajia Song ◽  
Jinbo Zhang ◽  
Xinnan Fan
Keyword(s):  
Fourier Transform ◽  
High Voltage ◽  
Online Monitoring ◽  
Pulse Current ◽  
Partial Discharge ◽  
Current Method ◽  
Capacitive Sensor ◽  
Accurate Diagnosis ◽  
Partial Discharges ◽  
Urgent Problem

Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

Understanding partial discharges in low-power relay and silicone cable modified to suit high-voltage requirement of deep sea electrical system

2018 ◽  
Vol 28 (6) ◽  
pp. e2542 ◽  
Author(s):  
Saravanakumar Arumugam ◽  
Yvonne Haba ◽  
Gerhard Koerner ◽  
Dirk Uhrlandt ◽  
Mathias Paschen
Keyword(s):  
Low Power ◽  
High Voltage ◽  
Deep Sea ◽  
Partial Discharges ◽  
Electrical System

scholarly journals Influence of Insulating Material Properties on Partial Discharges at DC Voltage

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4305
Author(s):  
Marek Florkowski
Keyword(s):  
Material Properties ◽  
Dielectric Material ◽  
Partial Discharge ◽  
Partial Discharges ◽  
Time Interval ◽  
Post Discharge ◽  
Insulating Material ◽  
Dc Voltage ◽  
The Impact

Understanding a partial discharge mechanism at direct current (DC) is an actual research topic that requires both modeling, simulations and measurements. This paper describes an influence of insulating material properties on partial discharges at DC voltage. Modifications of the traditional model reflecting the conditions of partial discharges (PD) inception and post discharge processes at DC voltage have been proposed. The aim was to show the partial discharge mechanisms and draw attention to the role of parameters of insulation materials adjacent to the cavity at DC voltage. The investigations were performed on two kinds of dielectric material used in power cables. Various combinations of specimens were designed to reveal the effect of the material resistivity on the PD activity. Key observations referred to the impact of the void adjacent material resistance on the partial discharge inception voltage threshold at DC voltage. The modified PD model was applied to analyze both inception and post discharge recovery stage. The role of dielectric properties of material adjacent to the void was investigated, highlighting its impact during static inception stage and in charging stage. Despite many simplifications introduced in the model, measurement results have confirmed the role of the dielectric material surrounding the void on partial discharge dynamics. The average time interval between PD pulses revealed a systematic relationship with respect to the applied voltage and specimen resistivity. This value can be considered in the future research for diagnostic indicator at DC voltage.

Partial Discharges Registration in Transformer Oil at the ‘Point-Plane’ Electrode System

2014 ◽  
Vol 698 ◽  
pp. 615-620 ◽  
Author(s):  
Aleksandr Bychkov ◽  
Sergey Korobeynikov ◽  
Aleksandr Ovsyannikov
Keyword(s):  
Partial Discharge ◽  
Experimental Studies ◽  
Electrode System ◽  
Partial Discharges ◽  
Transformer Oil ◽  
Optical Methods ◽  
Time Duration ◽  
Negative Point ◽  
Different Types ◽  
System Point

The results of the experimental studies of partial discharges in GK transformer oil with electrode system “point-plane” that provide sharp inhomogeneous electric field are presented. It was found out that two types of partial discharge pulses which differ in form and time duration appeared at the negative point polarity of the needle. The study of different types of pulses was conducted by electric and electro-optical methods of partial discharge registration.

scholarly journals Spiral Antenna Design and Analysis As a Tool to Measure Partial Discharge in High Voltage Equipment

2021 ◽  
Vol 328 ◽  
pp. 02006
Author(s):  
Deni Tri Laksono ◽  
Dedi Tri Laksono ◽  
Miftachul Ulum
Keyword(s):  
High Voltage ◽  
Return Loss ◽  
Partial Discharge ◽  
Electrical Equipment ◽  
Antenna Design ◽  
Spiral Antenna ◽  
Literature Study ◽  
Measurement Results

The high-voltage equipment often experiences disturbances caused by the age of the equipment, installation errors, partial discharge disturbances. Of these kinds of disturbances, partial discharge is one of the most common disturbances in high-voltage equipment which has a percentage level of 80% due to partial disturbance. In this study, a research related to electrical equipment that can detect partial discharge disturbances in these high-voltage equipment was done. The equipment is a spiral antenna, where the spiral antenna has several advantages in detecting partial discharge. In making the first partial discharge, a literature study will be carried out first, after that designing a spiral antenna using CST 2018 software to get the Return loss and VSWR parameters as desired, namely Return Loss less than -10 and VSWR less than 2. From the results of this study Spiral antenna is measured using VNA, the measurement results show the spiral antenna is in accordance with the parameters that have been determined, namely the return loss value = -30.8 and the VSWR value = between 1 to 1.5.

scholarly journals Identification of Acoustic Signals of Internal Electric Discharges on Glass Insulator under Variable Applied Voltage

2016 ◽  
Vol 6 (2) ◽  
pp. 827
Author(s):  
Nasir A. Al-geelani ◽  
M. Afendi M. Piah ◽  
Ibrahim Saeh ◽  
Nordiana Azlin Othman ◽  
Fatin Liyana Muhamedin ◽  
...  
Keyword(s):  
High Voltage ◽  
Acoustic Emissions ◽  
Digital Processing ◽  
Electrical Equipment ◽  
Electric Discharges ◽  
Voltage Transformer ◽  
Different Types ◽  
High Voltage Transformer ◽  
Glass Insulator ◽  
The Time Domain

<p>A Partial Discharge (PD) is an unwanted phenomenon in electrical equipment. Therefore it is of great importance to identify different types of PD and assess their severity. This paper investigates the acoustic emissions associated with Internal Discharge (ID) from different types of sources in the time-domain. An experimental setup was arranged in the high voltage laboratory, a chamber with an electrode configuration attached to it was connected to a high voltage transformer for generating various types of PD. A laboratory experiment was done by making the models of these discharges. The test equipment including antennas as a means of detection and digital processing techniques for signal analysis were used. Wavelet signal processing was used to recover the internal discharge acoustic signal by eliminating the noises of many natures.</p>

scholarly journals Experimental determination of partial discharges in a model of a digital instrument transformer by differential method

Vestnik IGEU ◽  
2019 ◽  
pp. 32-42
Author(s):  
A.V. Gusenkov ◽  
V.D. Lebedev ◽  
S.N. Litvinov ◽  
S.A. Slovesny ◽  
A.A. Yablokov
Keyword(s):  
Condition Monitoring ◽  
High Voltage ◽  
Partial Discharge ◽  
Essential Elements ◽  
Differential Method ◽  
Partial Discharges ◽  
Discharge Characteristics ◽  
Reliability Indicators ◽  
Instrument Transformer ◽  
Inductive Sensors

Power facilities are now implementing the concept of smart grid and its essential elements – high-voltage digital current and voltage transformers. However, the implementation of digital technologies is slowed down by the lack of operation experience and reliability indicators. One of the main causes of high-voltage equipment failures is insulation damage. The most informative parameters determined by insulation evaluation are partial discharge characteristics. There are rated values of these characteristics for rotating electrical machines and power transformers measured by external equipment. But the existing method of partial discharge analysis cannot be applied to digital current and voltage transformers as there are no criteria for tripping of the innovative equipment with comprehensive insulation. All this urges us to study the possibility to determine experimentally the characteristics of partial discharges in the insulation of digital current and voltage transformers by using embedded inductive sensors in order to develop a method for condition monitoring of digital current and voltage transformers and improving of their reliability. In this work, we have used a model of digital current and voltage transformers, a high-voltage test unit, a digital multi-input oscciloscope and inductive sensors. The experiment includes: detecting partial discharges in the model of digital current and voltage transformers by the external bridge connection, recording the voltage at which partial discharges occur in the simulated fault area, measuring the corresponding value of the apparent charge of the partial discharge, detecting partial discharges in the model of digital current and voltage transformers by a differential method with the help of embedded inductive sensors. The characteristics of partial discharges in the simulated fault area have been experimentally determined on a model of digital current and voltage transformers. The pulse voltage on the embedded inductive sensor corresponding to the apparent charge of 80 pC was equal to 600 mV at the test voltage of 2,7 kV. Embedded inductive sensors allow implementing the method of insulation condition monitoring for digital current and voltage transformers in accordance with the partial discharge characteristics both at the stages of production and operation extending the potential of the electronic (microprocessor) module and increasing the reliability of digital current and voltage transformers.

Identification of Acoustic Signals of Internal Electric Discharges on Glass Insulator under Variable Applied Voltage

2016 ◽  
Vol 6 (2) ◽  
pp. 827 ◽  
Author(s):  
Nasir A. Al-geelani ◽  
M. Afendi M. Piah ◽  
Ibrahim Saeh ◽  
Nordiana Azlin Othman ◽  
Fatin Liyana Muhamedin ◽  
...  
Keyword(s):  
High Voltage ◽  
Acoustic Emissions ◽  
Digital Processing ◽  
Electrical Equipment ◽  
Electric Discharges ◽  
Voltage Transformer ◽  
Different Types ◽  
High Voltage Transformer ◽  
Glass Insulator ◽  
The Time Domain

<p>A Partial Discharge (PD) is an unwanted phenomenon in electrical equipment. Therefore it is of great importance to identify different types of PD and assess their severity. This paper investigates the acoustic emissions associated with Internal Discharge (ID) from different types of sources in the time-domain. An experimental setup was arranged in the high voltage laboratory, a chamber with an electrode configuration attached to it was connected to a high voltage transformer for generating various types of PD. A laboratory experiment was done by making the models of these discharges. The test equipment including antennas as a means of detection and digital processing techniques for signal analysis were used. Wavelet signal processing was used to recover the internal discharge acoustic signal by eliminating the noises of many natures.</p>

Sign in / Sign up

Export Citation Format

Share Document