scholarly journals Amplitude Distribution of Partial Discharge Signals on Tunnel-Installed High-Voltage Cables

2019 ◽  
Vol 9 (21) ◽  
pp. 4595 ◽  
Author(s):  
Yong Qian ◽  
Xiaoxin Chen ◽  
Yiming Zang ◽  
Hui Wang ◽  
Gehao Sheng ◽  
...  
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Current Method ◽  
Signal Amplitude ◽  
Amplitude Distribution ◽  
Xlpe Cable ◽  
Bonding Wires ◽  
Cable Laying ◽  
Cable Systems ◽  
The Cross

For 110 kV and above tunnel-installed high-voltage (HV) cross-linked poly-ethylene (XLPE) cable systems, it is a normal procedure to adopt a cross-bonding scheme. The high-frequency current method is frequently used in the cross-bonded cable systems for on-site or online partial discharge (PD) detection by monitoring the signals on the cross-bonding wires. To further study the amplitude distribution characteristics of the PD signals, a parametric characteristic admittance model of a three-phase cable system in a tunnel is established based on Tylavsky’s formulas. The model is used to calculate the amplitude distribution formula of the PD pulse current on the cross-bonding wires. In addition, the influence of cable laying and tunnel environment on the amplitude distribution is also studied. Finally, the correctness of the model and the conclusion are verified by simulation experiments and on-site tests. The results show that the signal amplitude distribution is determined by the ratio of the characteristic admittances. As the distance between the cables and the distance from the inner wall of the tunnel increase, the amplitude difference gradually decreases.

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.

Functions and Theoretical Basis of Partial Discharge On-Line Monitoring System for High-Voltage Cables

2014 ◽  
Vol 672-674 ◽  
pp. 854-857
Author(s):  
Dan Pang ◽  
Xi Lin Zhang ◽  
Zhen Hao Wang ◽  
Dan Zhang ◽  
Xiao Juan Han
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Diagnostic System ◽  
Signal Acquisition ◽  
Xlpe Cable ◽  
Remote Diagnostics ◽  
Testing Technology ◽  
Discharge Status ◽  
On Line ◽  
Frequency Current

A partial discharge (PD) on-line monitoring and positioning system for high-voltage cables based on double-ended testing technology is developed. The hardware of this system includes a high-frequency current sensor, site PD signal acquisition and PD monitoring server. In order to achieve real-time monitoring and remote diagnostics of the XLPE cable partial discharge status, the designed software system is divided into front-end control system and remote diagnostic system. And finally, the correctness and effectiveness of the system is verified by XLPE cable partial discharge testing.

scholarly journals Development process and testing of partial discharge detection device on medium voltage XLPE cable

2020 ◽  
Vol 19 (3) ◽  
pp. 1297
Author(s):  
Mohamad Izmir Farhan Mohamad Radzi ◽  
N H Nik Ali ◽  
Azrul Mohd Ariffin ◽  
Muhamad Safwan Abd Rahman ◽  
Norhidayu Rameli ◽  
...  
Keyword(s):  
High Voltage ◽  
Acoustic Waves ◽  
Development Process ◽  
Partial Discharge ◽  
Vital Role ◽  
Xlpe Cable ◽  
Medium Voltage ◽  
Void Defects ◽  
Development Processes ◽  
Discharge Detection

High voltage assets play a vital role in providing uninterrupted power to the consumers and any slight problems experienced by the assets may cause losses in millions of dollars to businesses. Therefore it is of utmost importance to monitor the health of high voltage assets. This research presents the development process of a Partial Discharge (PD) device that is able to detect PD acoustic waves for monitoring high voltage assets purposes. Medium voltage Cross-Linked Polyethylene (XLPE) cable was used which was introduced with spherical void defects at the joints of the cable that functioned to produce PD acoustic waves. Outcome of the development processes provides the finished design of the PD sensing device, known as Partial Discharge Detection (PDD) device. The functionality of the PDD device was also assessed through controlled experimentations, and they proved to be successful. Pure PD waveform captured by the ultrasonic sensor was similar when compared to a HFCT sensor’s pure PD waveform. The PDD device is a small and affordable, and is opened to various improvements such as integrating Artificial Intelligence (AI) unto the device, and one day may replace most existing bulky and expensive PD sensing devices that are readily available in the market.

Investigation of Void Size and Location on Partial Discharge Activity in High Voltage XLPE Cable Insulation

2019 ◽  
Author(s):  
Douglas Aguiar do Nascimento ◽  
Shady S. Refaat ◽  
Ahmad Darwish ◽  
Qasim Khan ◽  
Haitham Abu-Rub ◽  
...  
Keyword(s):  
High Voltage ◽  
Partial Discharge ◽  
Void Size ◽  
Cable Insulation ◽  
Xlpe Cable ◽  
Discharge Activity

A New Approach for Partial Discharge Modeling in High Voltage Cables Considering Nonlinear Permittivity Using Finite Element Method

2020 ◽  
Vol 12 (4) ◽  
pp. 457-463
Author(s):  
Asaad Shemshadi ◽  
Pourya Khorampour
Keyword(s):  
Finite Element ◽  
High Voltage ◽  
Partial Discharge ◽  
Nonlinear Function ◽  
New Approach ◽  
Novel Technique ◽  
Remote Assessment ◽  
Cable Systems ◽  
Discharge Modeling ◽  
Simple Modeling

Herein, we report a novel technique to develop remote assessment and observation for partial discharge events under high voltage cable systems output. Finite element modeling of the cavities bided in the insulators which are the source of Partial Discharge signals occurred in a 3-d section of a typical 230 KV high voltage XLPE 3-phase cable. All electromagnetic related equations are solved using FEM software. The idea is to consider the permittivity constant in cavities as a nonlinear function during the solving process. This function is related to electric field value inside each cavity. This modeling leads to a new approach in simple modeling of PD phenomena in the H. V. apparatus with the big amount of destructive PD cavities. In continue, the obtained waveform is illustrated respecting to the main power line waveform.

Investigation of Cable Partial Discharge Characteristics Based on Weibull Distribution

2015 ◽  
Vol 737 ◽  
pp. 252-255
Author(s):  
Sheng Hong He ◽  
Qing Hua Zhan ◽  
Yi Ming Zhang ◽  
Yan Ran Li ◽  
Chong Wei ◽  
...  
Keyword(s):  
Weibull Distribution ◽  
Shape Parameter ◽  
Maximum Likelihood Method ◽  
Partial Discharge ◽  
Amplitude Distribution ◽  
Likelihood Method ◽  
Defect Model ◽  
Artificial Defect ◽  
Xlpe Cable ◽  
Different Types

In order to study the application of Weibull distribution in cable partial discharge pattern recognition. We apply a 10kV 30m XLPE cable for this study. Then design four kinds of typical artificial defect model and analyze each of defect model’s discharge pulse signals. Finally, estimate the Weibull distribution of signals by use of the maximum likelihood method. The results show that Weibull probability distribution is similar to partial discharge amplitude distribution, the shape parameter β can be used to identify different types of discharge.

scholarly journals Case Analysis on Partial Discharge Signal of XLPE Cable T-Joint by Using High-Frequency Pulse Current Method

2017 ◽  
Vol 141 ◽  
pp. 545-550 ◽  
Author(s):  
Zhang Hao ◽  
Duan Yubing ◽  
Wang Bin ◽  
Liu Hui ◽  
Lin Ying ◽  
...  
Keyword(s):  
High Frequency ◽  
Pulse Current ◽  
Partial Discharge ◽  
Case Analysis ◽  
Current Method ◽  
Xlpe Cable ◽  
Frequency Pulse

The Design of High-Voltage Cable Partial Discharge On-Line Monitoring System Software

2014 ◽  
Vol 672-674 ◽  
pp. 810-813 ◽  
Author(s):  
Xi Lin Zhang ◽  
Zhen Hao Wang ◽  
Zhong Ying Huang ◽  
Xiao Juan Han
Keyword(s):  
System Design ◽  
Monitoring System ◽  
High Voltage ◽  
Partial Discharge ◽  
Positioning System ◽  
System Software ◽  
On Line ◽  
The Cross ◽  
Design And Application

This article is one of the series of papers about the Cross-linked polyethylene cable partial discharge on-line monitoring and positioning system. Design and application, which is about the Cross-linked polyethylene cable partial discharge on-line monitoring and positioning system software, is discussed from the run analysis , log record and PC control, etc. Basing on the field running effect of the Cross-linked polyethylene cable partial discharge on-line monitoring and positioning system, it manifests the correctness and effectiveness of the above methods.

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