The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of MATHEMATICAL MODELS AND METHODS IN APPLIED SCIENCES
Transactions ID Number: 20-798
Full Name: Dr Suwarno
Position: Professor
Age: ON
Sex: Male
Address: School of Electrical Engineering and Informatics, Institut Teknologi Bandung
Country: INDONESIA
Tel: +62222502260
Tel prefix: 62
Fax: +62222534222
E-mail address: suwarno@ieee.org
Other E-mails: suwarno@stei.itb.ac.id
Title of the Paper: Model and Computer Simulation of Partial Discharge Patterns in Natural Liquid Insulation for High Voltage Application
Authors as they appear in the Paper: Suwarno and Heri Sutikno
Email addresses of all the authors: suwarno@ieee.org,suwarno@stei.itb.ac.id
Number of paper pages: 8
Abstract: Electric power is widely used worldwide due to its superior characteristics. The superior characteristics such as easy for generating, transmitting and distributing as well as utilizing the electric power caused the demand of the electric power increased steadily. For transmitting a large amount of electric energy a power system is needed. The high efficiency of the system is obtained by applying high voltage system. In a high voltage system several key equipments such as transformers, insulators, generators play important roles. High voltage transformers is a key equipment and widely used in electric power systems. To withstand high electric field, insulation is most important part. In general a high voltage transformer has solid insulation in the form of paper and liquid insulation in the form of oil. Oil insulation is important component in the transformers. During operating condition, the oil serves as electrical insulation to separate between life parts a!
nd with ground and acts as coolant in transformers. For normal operation, the integrity of the oil insulation is important factor of the transformer. In particular condition an excessive electric field may occur and partial discharges may occur in the oil insulation which may degrade the performance of the insulation. The occurrence of the partial discharge (PD) is also an indication of insulation abnormality. There are 3 kinds of oil insulations. They are mineral, synthetic and natural oils. Mineral oils is widely used since long time ago. However, due to the availability of the oil and environmental effects of the mineral oil, the natural oil is being popular. The oil is organic bases and has a high bio-degradability. This paper reports the measurement, modeling and simulation of partial discharges in natural oil. The oil used was BIOTEMP. The partial discharges were generated using needle-plane electrode system under sinusoidal voltage. The needle plane electrode!
is able to simulate a very high electric field. Partial discharge mea
surement was conducted using phase-resolved measurement system which able to measure the PD magnitude (q), phase of PD occurrence (φ)as well as PD number (n). The task was done using a digital oscilloscope combined with a personal computer. The analysis of the PD data was conducted by utilizing φ-q-n and φ-n pattern. The experimental results showed that PD took place at around the peak of the applied voltage. Phase-resolved analysis indicated that PD magnitude as well as PD occurrence were strongly dependent on the instantaneous applied voltage. Based on the experimental results, a PD model in natural oil was proposed based on the Whitehead PD equivalent circuit. The model was used to simulate PD in the oil. The simulation was able to generate φ-q-n and φ-n patterns similar to those obtained from the measurement.
Keywords: computer simulation, phase-resolved, partial discharges, model, transformer oil
EXTENSION of the file: .pdf
Special (Invited) Session: Measurement, Modeling and Computer Simulation of Partial Discharges in Natural Liquid Insulation for High Voltage Transformer
Organizer of the Session: 655-285
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