Wieslaw Gil - Academia.edu (original) (raw)
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Papers by Wieslaw Gil
Energies
The article presents a novel on-line partial discharge (PD) monitoring system for power transform... more The article presents a novel on-line partial discharge (PD) monitoring system for power transformers, whose functioning is based on the simultaneous use of three unconventional methods of PD detection: high-frequency (HF), ultra-high frequency (UHF), and acoustic emission (AE). It is the first monitoring system equipped in an active dielectric window (ADW), which is a combined ultrasonic and electromagnetic PD sensor. The article discusses in detail the process of designing and building individual modules of hardware and software layers of the system, wherein the most attention was paid to the PD sensors, i.e., meandered planar inverted-F antenna (MPIFA), high-frequency current transformer (HFCT), and active dielectric window with ultrasonic transducer, which were optimized for detection of PDs occurring in oil-paper insulation. The prototype of the hybrid monitoring system was first checked on a 330 MVA large power transformer during the induced voltage test with partial discharge ...
Journal of Energy - Energija
Overvoltages and transients are sometimes recognized as the cause of bushings’ rapid failure. Thi... more Overvoltages and transients are sometimes recognized as the cause of bushings’ rapid failure. This fact is confirmed by the studies published at the 2018 CIGRE session. They can also initiate dangerous resonance phenomena in transformer windings. The identification of very fast overvoltages characterized by high dynamics of voltage changes, so-called "transients", is difficult due to the limited frequency response of station voltage transformers. However, the bushing monitoring systems, based on the so-called "voltage method" can be used for this purpose successfully. There are several running bushing monitoring systems based on this method in Poland. The transients’ events are registered together with their oscillographs in Transformer Monitoring Systems (TMS). The overvoltage statistics are also performed to support service procedures.The TMS are integrated with station systems, which greatly increases the possibility of overvoltages phenomena analyzing.
2010 International Conference on High Voltage Engineering and Application, 2010
We describe the reasons to design and apply advanced expert “on-line” systems to extend the typic... more We describe the reasons to design and apply advanced expert “on-line” systems to extend the typical power transformer supervision. A new specialized devices are introduced to enhance supervising ability. We demonstrate that the usage of efficient network communication simplifies their application, integration with existing systems, maintenance and service. We present a list of messages, warnings and alarms which was created to inform directly and quickly about dangers and expanding incorrect processes. Our experience allows to base the opinion, that the expert monitoring efficiency and usefulness depend on the connection to the existing station dispatch systems and remote supervising centers.
Energies
The article presents a novel on-line partial discharge (PD) monitoring system for power transform... more The article presents a novel on-line partial discharge (PD) monitoring system for power transformers, whose functioning is based on the simultaneous use of three unconventional methods of PD detection: high-frequency (HF), ultra-high frequency (UHF), and acoustic emission (AE). It is the first monitoring system equipped in an active dielectric window (ADW), which is a combined ultrasonic and electromagnetic PD sensor. The article discusses in detail the process of designing and building individual modules of hardware and software layers of the system, wherein the most attention was paid to the PD sensors, i.e., meandered planar inverted-F antenna (MPIFA), high-frequency current transformer (HFCT), and active dielectric window with ultrasonic transducer, which were optimized for detection of PDs occurring in oil-paper insulation. The prototype of the hybrid monitoring system was first checked on a 330 MVA large power transformer during the induced voltage test with partial discharge ...
Journal of Energy - Energija
Overvoltages and transients are sometimes recognized as the cause of bushings’ rapid failure. Thi... more Overvoltages and transients are sometimes recognized as the cause of bushings’ rapid failure. This fact is confirmed by the studies published at the 2018 CIGRE session. They can also initiate dangerous resonance phenomena in transformer windings. The identification of very fast overvoltages characterized by high dynamics of voltage changes, so-called "transients", is difficult due to the limited frequency response of station voltage transformers. However, the bushing monitoring systems, based on the so-called "voltage method" can be used for this purpose successfully. There are several running bushing monitoring systems based on this method in Poland. The transients’ events are registered together with their oscillographs in Transformer Monitoring Systems (TMS). The overvoltage statistics are also performed to support service procedures.The TMS are integrated with station systems, which greatly increases the possibility of overvoltages phenomena analyzing.
2010 International Conference on High Voltage Engineering and Application, 2010
We describe the reasons to design and apply advanced expert “on-line” systems to extend the typic... more We describe the reasons to design and apply advanced expert “on-line” systems to extend the typical power transformer supervision. A new specialized devices are introduced to enhance supervising ability. We demonstrate that the usage of efficient network communication simplifies their application, integration with existing systems, maintenance and service. We present a list of messages, warnings and alarms which was created to inform directly and quickly about dangers and expanding incorrect processes. Our experience allows to base the opinion, that the expert monitoring efficiency and usefulness depend on the connection to the existing station dispatch systems and remote supervising centers.