Multi-Stable Stochastic Resonance Based Protection Scheme for Parallel Transmission Lines with UPFC


  • Mary A.G. Ezhil Arunachala College of Engineering for women, Tamilnadu, India.
  • Joseph Jawhar S Principal, Arunachala College of Engineering for women, Tamilnadu, India.
  • Chellaswamy C Department of Electronics and Communication Engineering, Rajalakshmi Institute of Technology, Chennai, Indvia.



complex wavelet transform, unified power flow controller, collective sum technique, spectral energy, double line transmission system, multi-scale stochastic resonance


This paper presents a multi-stable stochastic resonance (MSR) based on complex wavelet transform (CWT) for protecting a double line transmission system with unified power flow controller (UPFC) in one line. The fault detection at the sending end is recognized by the collective sum technique (CST) using the current signals of all the three-phases with heavy background noise. The noisy signal is processed by parameter compensation and the processed signal is decomposed by CWT with different scale frequencies. The spectral energies of each phase can be used to identify the faulty phases. The CWT is used to compute the spectral energies of each phase current. The proposed scheme has been studied for wide variation of operating parameters and compared with two other fault extraction methods such as EMD-based spectral analysis and wavelet transform with post spectral analysis. The test results of the proposed CWT based MSR algorithm indicates that it can accurately detect and classify the fault with in one cycle from fault inception.


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Author Biography

Mary A.G. Ezhil, Arunachala College of Engineering for women, Tamilnadu, India.

Department of Electrical and Electronics Engineering,


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How to Cite

Ezhil, M. A., Jawhar S, J., & C, C. (2016). Multi-Stable Stochastic Resonance Based Protection Scheme for Parallel Transmission Lines with UPFC. JOURNAL OF ADVANCES IN CHEMISTRY, 12(23), 5458–5471.