Parameter Identification and Calculation of Return Voltage Curve Based on FDS Data
- 5 August 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 24 (5), 1-5
- https://doi.org/10.1109/tasc.2014.2344763
Abstract
Frequency domain spectroscopy (FDS) method based on dielectric response measurement technique is being investigated as a potential tool for condition assessment of transformer insulation. It is a simple and nondestructive method to monitor insulation status of transformer. This paper establishes a mathematical model with the data of frequency domain spectroscopy for solving parameter of dielectric response equivalent circuit, which is a group of nonlinear equations. It is difficult to solve the problem using nonlinear least square optimization method. The problem solving for nonlinear equations is transformed to the constrained optimization problem using nonlinear least square method, and then, the bacterial foraging algorithm is used for solving the problem. According to identified circuit parameters, the FDS curve is obtained, which compares the calculated data with the measured. The relative error is controlled in 1%, which demonstrates the parameter identification method is successful. The return voltage curve can be calculated from the estimated circuit parameters for verifying insulation condition. Therefore, the transformer insulation condition can be diagnosed using multi-physical parameters with FDS and RVM data comprehensively, to improve the accuracy of diagnosis.Keywords
Funding Information
- National Natural Science Foundation of China (51307097)
- Natural Science Fund Projects in Hubei Province (2011CDB185)
- Education Department Science Fund projects in Hubei province (Q20121304)
- Graduate Scientific Research Foundation of China Three Gorges University (2013CX042)
This publication has 15 references indexed in Scilit:
- Bacteria foraging optimization algorithm based load frequency controller for interconnected power systemInternational Journal of Electrical Power & Energy Systems, 2011
- Temperature and thermal aging effects on the Frequency Domain Spectroscopy measurement of oil-paper insulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2009
- Application of dielectric response for oil-immersed transformerPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2009
- Effects of moisture and temperature on the frequency domain spectroscopy analysis of power transformer insulationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- Evaluation of transformer oil by Frequency domain techniquePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2008
- Multi-machine power system stabilizer design by rule based bacteria foragingElectric Power Systems Research, 2007
- Deriving an Equivalent Circuit of Transformers Insulation for Understanding the Dielectric Response MeasurementsIEEE Transactions on Power Delivery, 2005
- Applications of dielectric spectroscopy in time and frequency domain for HV power equipmentIEEE Electrical Insulation Magazine, 2003
- Dielectric response methods for diagnostics of power transformersIEEE Electrical Insulation Magazine, 2003
- Modeling the polarization spectrum in composite oil/paper insulation systemsIEEE Transactions on Dielectrics and Electrical Insulation, 1999