Enhanced Dual-Spectrum Line Interpolated FFT with Four-Term Minimal Sidelobe Cosine Window for Real-Time Harmonic Estimation in Synchrophasor Smart-Grid Technology

Autor(es)

Oruganti, Venkata Subrahmanya Raghavendra Varaprasad ^[1] ; Dhanikonda, Venkata Sesha Samba Siva Sarma ^[1] ; Paredes, Helmo Kelis Morales ^[2] ; Simoes, Marcelo Godoy ^[3]

Afiliação do(s) autor(es)

^[1] Natl Inst Technol Warangal, Dept Elect Engn, Warangal 506004, Andhra Pradesh - India

^[2] Sao Paulo State Univ Unesp, Inst Sci & Technol, Av Tres de Marco 511, BR-18087180 Sorocaba, SP - Brazil

^[3] Colorado Sch Mines, Dept Elect Engn & Comp Sci, 1610 Illinois St, Golden, CO 80401 - USA

• Tipo de documento: Artigo Científico
• Fonte: ELECTRONICS; v. 8, n. 2 FEB 2019.
• Citações Web of Science: 0

Resumo

The proliferation of nonlinear loads and integration of renewable energy sources require attention for accurate harmonic estimation along with estimation of fundamental amplitude, phase, and frequency for protection, improving power quality, and managing power effectively in a smart distribution grid. There are currently different Windowed Interpolated Fast Fourier Transform (WIFFT) algorithms for harmonic voltage estimation, but estimation of current harmonics using WIFFT is not explored sufficiently. The existing WIFFT algorithms, when used for current harmonic estimation result in low accuracy due to spectral leakage and picket fence effect. On the other hand, Interpolated Discrete Fourier Transform (DFT) is used for synchrophasor quality metrics, but it is effective only when there are no harmonics and the fundamental frequency is constant. This paper proposes a unified solution, comprising of peak location index search (PLIS)-based Dual-Spectrum Line Interpolated Fast Fourier Transform (DSLIFFT) algorithm with 4-Term Minimal Sidelobe Cosine Window (4MSCW) for estimating both low-amplitude voltage or current harmonics and synchrophasor under variable frequency conditions for high-penetration renewable energy utility grids. The effectiveness of the proposed algorithm is validated by simulation studies and real-time experimentation using the National Instruments reconfigurable embedded system under nonlinear loading conditions. (AU)

• Processo FAPESP: 17/22629-9 - Desenvolvimento de técnicas de compensação e metodologias para análise da qualidade de energia dos modernos sistemas de distribuição
• Beneficiário: Helmo Kelis Morales Paredes
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 16/08645-9 - Pesquisas interdisciplinares em redes inteligentes de energia elétrica
• Beneficiário: João Bosco Ribeiro do Val
• Modalidade de apoio: Auxílio à Pesquisa - Temático