RVM versus PDC Methods for Insulations’ Conductivity and Moisture Content Monitoring
DOI:
https://doi.org/10.11113/jt.v64.2100Keywords:
Degradation, PDC, RVM, moisture content, conductivityAbstract
Degradation due to ageing is a major concern for the life span of high voltage insulation. In maintaining the insulation system’s performance, it is crucial to monitor the insulation condition as it contributes to the whole system’s efficiency and safety. Many diagnostic methods have been introduced, and in use for monitoring the condition of insulation. Measurement and analysis in either frequency or time domain. Condition-based monitoring (CBM) is in growing interest lately, compared to time-based monitoring due to the increasing population of aged insulators being utilized in existing power systems. Time-based monitoring has then been integrated with CBM. CBM’s ability to enhance reliability, improve safety and reduce hazard of a system has been recognized by many researchers and utilities. This paper presents the study and comparison of two time domain CBM techniques namely the polarization and depolarization current (PDC) measurement and return voltage measurement (RVM). Findings of previous researches on determining the insulator’s moisture content and conductivity by both methods were reviewed. Moisture content and conductivity affect the dielectric response of the insulation material. Thus, condition of the insulation system can be determined based on these two characteristics.
References
E. Ildstad, et al. 1994. Relation Between Return Voltage and Other Methods for Measurements of Dielectric Response. In Electrical Insulation, 1994., Conference Record of the 1994 IEEE International Symposium. 25–28.
T. K. Saha and P. Purkait. 2004. Investigation of Polarization and Depolarization Current Measurements for the Assessment of Oil-paper Insulation of Aged Transformers. Dielectrics and Electrical Insulation, IEEE Transactions. 11: 144–154.
T. K. Saha and P. Purkait. 2003. Investigating Some Important Parameters of the PDC Measurement Technique for the Insulation Condition Assessment of Power Transformer. Presented at the International Power Engineering Conference, Singapore.
N. A. M. Jamail, et al. 2011. Comparative Study on Conductivity using Polarization and Depolarization Current (PDC) Test for HV insulation. In Electrical Engineering and Informatics (ICEEI), 2011 International Conference. 1–6.
W. S. Zaengl. 2003. Dielectric spectroscopy in Time and Frequency Domain for HV Power Equipment. I. Theoretical Considerations. Electrical Insulation Magazine, IEEE. 19: 5–19.
T. K. Saha and P. Purkait. 2005. Impact of The Condition Of Oil On The Polarisation Based Diagnostics For Assessing The Condition Of Transformers Insulation. In Power Engineering Society General Meeting, 2005. IEEE. 2: 1881–1886.
T. K. Saha and P. Purkait. 2004. Investigation of An Expert System for the Condition Assessment of Transformer Insulation Based on Dielectric Response Measurements. Power Delivery, IEEE Transactions. 19: 1127–1134.
A. Krivda, et al. 1997. Assessment of Insulation Condition of 130 kV Oil-Paper Current Transformers Using Return Voltage Measurements and an Expert System. In Electrical Insulation and Dielectric Phenomena, 1997. IEEE 1997 Annual Report., Conference. 1: 210–213.
O. Hassan, et al. 2003. Diagnostic of Insulation Condition of Oil Impregnated Paper Insulation Systems with Return Voltage Measurements. In Electrical Insulation and Dielectric Phenomena, 2003. Annual Report. Conference. 153–156.
T. K. Saha and Y. Zheng Tong. 2003. Experience with Return Voltage Measurements for Assessing Insulation Conditions in Service-aged Transformers. Power Delivery, IEEE Transactions. 18: 128–135.
G. Frimpong, et al. 1997. Measurement and Modeling of Dielectric Response of Composite Oil/Paper Insulation. In Properties and Applications of Dielectric Materials, 1997., Proceedings of the 5th International Conference. 1: 86–89.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
