Optimal C-Type Filter Design to Maximize Transformer's Loading Capability under Non-sinusoidal Conditions

Abstract

The main purpose of this article is to employ the C-type passive filters for maximization of the loading capability of transformers under non-sinusoidal conditions. For this aim, an optimal passive filter design approach is proposed regarding minimization of the harmonic loss factor (F_HL), which is defined in IEEE standard C57.110 to represent the loading capability of the transformers supplying non-sinusoidal load currents. With respect to IEEE standard 519, displacement power factor and individual harmonics & total harmonic distortions of the voltage and current are considered as constraints of the proposed optimal filter design approach. In addition, numerical results are presented to figure out that the proposed approach provides higher loading capability of the transformers under non-sinusoidal conditions when compared with the other two optimal filter design approaches based on minimization of the current total harmonic distortion and minimization of the voltage total harmonic distortion.

Keywords:

• harmonic distortion
• non-sinusoidal conditions
• non-linear loads
• transformers
• harmonic loss factor
• transformer derating
• transformer's loading capability
• passive filters
• C-type passive filter
• optimal filter design

Additional information

Notes on contributors

Murat Erhan Balci

Murat Erhan Balci received the B.Sc. degree from Kocaeli University, and the M.Sc. and D.Sc. degrees from Gebze Institute of Technology, Turkey, in 2001, 2004 and 2009, respectively,. Since 2009, he has been with the Electrical and Electronics Engineering Department of Balikesir University, Turkey as Assistant Professor. His main areas of expertise are electric machines, power electronics, power quality, power system analysis and wind power.