Wide-area measurement and early warning system for wide-band oscillations in “double-high” power systems

MA Ningning; XIE Xiaorong; TANG Jian; CHEN Lei

doi:10.16511/j.cnki.qhdxxb.2021.21.014

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (5) : 457-464. DOI: 10.16511/j.cnki.qhdxxb.2021.21.014

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Wide-area measurement and early warning system for wide-band oscillations in “double-high” power systems

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Abstract

The wide-band oscillation problem caused by the high penetration of renewable energy sources and the high proportion of power electronic equipment, “double-high” systems, seriously affects normal power equipment operation and power system stability. Such systems require on-line monitoring and analyses of the multi-mode and time-varying wide-band oscillation frequency. Traditional wide-area measurement systems (WAMS) can monitor low-frequency oscillations in power grids in real-time. However, they cannot monitor wide-band electromagnetic oscillations. This paper presents a wide-area measurement and early warning system (WAMWS) for monitoring wide-band oscillations in “double-high” power systems. This system has all the functions in the existing WAMS while monitoring wide-band oscillations in “double-high” power systems. The warning system provides wide-band state estimates, oscillation source identification, and security and stability evaluations of the wide-band oscillations. The effectiveness of this system for monitoring wide-band oscillations is verified in simulations. Finally, this paper considers applications of WAMWS.

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“double-high” power systems / renewable power generation / power electronic equipment / wide-band oscillations / wide-area measurement and early warning systems

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MA Ningning, XIE Xiaorong, TANG Jian, CHEN Lei. Wide-area measurement and early warning system for wide-band oscillations in “double-high” power systems[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(5): 457-464 https://doi.org/10.16511/j.cnki.qhdxxb.2021.21.014

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