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 Design of Fractal Features-Based Partial Discharge Pattern Recognition using Multi Support Vector Machine Method

2018 ◽  
Vol 159 ◽  
pp. 02048
Author(s):  
Rahayu ◽  
G.T. Anuraga ◽  
H. Prasetia ◽  
Umar Khayam
Keyword(s):  
Pattern Recognition ◽  
Support Vector Machine ◽  
High Voltage ◽  
Partial Discharge ◽  
Diagnostic System ◽  
Diagnostic Technique ◽  
Recognition System ◽  
Support Vector ◽  
Machine Method ◽  
Pattern Recognition System

Partial Discharge (PD) is one of the causes of insulation deteriorisation mode and impacts on the reliability of high voltage equipment. Therefore, PD measurement is used for diagnostic technique of high voltage equipment. Diagnostic output of high voltage equipment contain information about PD type, PD cause, PD location and PD severity. after identification, a proper preventive maintenance pattern can be performed. Therefore PD pattern recognition system is very important on PD diagnostic system to recognize the PD pattern and determine the level of hazard that occurs in specimen object or high voltage equipment‥ In this paper, PD pattern recognition system is designed with fractal geometry approach and support vector machine (SVM) algorithm. The coding and programming of graphical user interface of the application is done. Each PD type and hazard level on various insulating materials (solid, liquid and gas) have the dimensions of the fractal and the lacunarity. The type of PD (void, corona) and its danger level (bad, fair and good) can be identified with the support vector machine (SVM)

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.

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.

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

Testing and Diagnosis of Extra High Voltage Power Cables Using Damped AC Voltages Combined with Distributed Partial Discharge Measurement

2014 ◽  
Vol 1070-1072 ◽  
pp. 1039-1043
Author(s):  
Biao Yan ◽  
Li Zhou ◽  
Jie Chen ◽  
Feng Bo Tao ◽  
Jian Zhang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Partial Discharge ◽  
Assessment Method ◽  
State Assessment ◽  
Signal Acquisition ◽  
Power Cables ◽  
Underground Cable ◽  
Distributed Measurement ◽  
Extra High Voltage

State assessment method of cables with extruded insulation and their accessories, DAC withstand test combined with a diagnostic test (such as PD measurement) has two shortcomings, the output voltage is not high enough for EHV cables, it cannot detect and locate PD effectively when defects are far away from signal acquisition point. This paper focus on DAC voltages up to 250kV and a kind of distributed measurement of PD. Defects existing in arbitrary of tested cable can be accurately measured in theory by installing sensor at intervals along the tested cable. This method has been validated on a long extra high voltage cross-linked polyethylene (XLPE) insulated underground cable circuit and the filed PD test has been completed successfully.

The Design of Multiplexer for On-Line Partial Discharge Monitoring System

2013 ◽  
Vol 753-755 ◽  
pp. 2227-2231
Author(s):  
Yuan Yang ◽  
Jian Gang Bi ◽  
Yan Peng Gong ◽  
Ning Yang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Partial Discharge ◽  
Simultaneous Detection ◽  
Field Application ◽  
Measuring System ◽  
Signal Acquisition ◽  
Time Sharing ◽  
On Line ◽  
Discharge Monitoring

Partial discharge is an important content of insulation monitoring of high-voltage power equipment, which generates high-frequency signals and real-time monitoring data is of great quantity. Simultaneous detection of multi-channel signals faces technical difficulty, and of high cost and poor reliability, it can also cause unnecessary waste of resources. In accordance with the characteristics and needs of partial discharge monitoring system at substation site, the concept of time-division multiplexing technology in communication technology is adopted into the multi-channel signal acquisition and measuring system, which using multiplexer MAX4638 and virtual instrument. The designed multiplexer for the partial discharge monitoring overcame several shortcomings, such as hardware resources consumption, poor reliability and high cost in multi-channel synchronous acquisition. By using of polling method to achieve one detection device for the time-sharing acquisition and processing of multiple devices or signals, this device can greatly enhance the on-line monitoring system economically and practically in the field application.

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