Defining SSO Power and Characterizing SSO Propagation in Power System with Wind Farms Integration

Na  Yang; Wenda  Ma; Xitian Wang; Da Xie; Chenghong Gu

doi:10.1109/TPWRS.2020.3044993

Defining SSO Power and Characterizing SSO Propagation in Power System with Wind Farms Integration

Na Yang, Wenda Ma, Xitian Wang, Da Xie, Chenghong Gu

Shanghai Jiao Tong University

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Abstract

This paper studies the characteristics of subsynchronous oscillation (SSO) power propagation in power systems with a large-scale wind farm integration. Based on the instantaneous power theory, a novel definition of SSO power is proposed to characterize its propagation. The SSO power contains both DC power components and AC power components. Utilizing SSO power, SSO propagation is quantitatively studied in single oscillation source systems, and further studied in multiple oscillation sources systems. Theoretical analysis reveals that in addition to the recognized impact of line impedance, power flow also affects SSO power propagation significantly. Hence, propagation impact factor is proposed for the determination of the dominant influencing element. To reveal SSO power propagation paths in a network, shunt coefficients of DC power components and AC power components are expressed respectively. Test cases under different operating conditions and a practical case are carried out to demonstrate analysis and conclusions in this paper.

Original language	English
Article number	9294081
Pages (from-to)	3531-3540
Journal	IEEE Transactions on Power Systems
Volume	36
Issue number	4
Early online date	15 Dec 2020
DOIs	https://doi.org/10.1109/TPWRS.2020.3044993
Publication status	Published - 1 Jul 2021

Funding

Manuscript received June 30, 2020; revised October 22, 2020; accepted December 5, 2020. Date of publication December 15, 2020; date of current version June 18, 2021. This work was supported in part by the National Natural Science Foundation of China under Grant 51677114, and in part by the Research Project of State Grid Corporation of China under Grant SGTYHT/16-JS-198. Paper no. TPWRS-01083-2020. (Corresponding author: Xitian Wang.) Na Yang, Wenda Ma, Xitian Wang, and Da Xie are with the Department of Electrical Engineering (the Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, China (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).

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abstract = "This paper studies the characteristics of subsynchronous oscillation (SSO) power propagation in power systems with a large-scale wind farm integration. Based on the instantaneous power theory, a novel definition of SSO power is proposed to characterize its propagation. The SSO power contains both DC power components and AC power components. Utilizing SSO power, SSO propagation is quantitatively studied in single oscillation source systems, and further studied in multiple oscillation sources systems. Theoretical analysis reveals that in addition to the recognized impact of line impedance, power flow also affects SSO power propagation significantly. Hence, propagation impact factor is proposed for the determination of the dominant influencing element. To reveal SSO power propagation paths in a network, shunt coefficients of DC power components and AC power components are expressed respectively. Test cases under different operating conditions and a practical case are carried out to demonstrate analysis and conclusions in this paper.",

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AB - This paper studies the characteristics of subsynchronous oscillation (SSO) power propagation in power systems with a large-scale wind farm integration. Based on the instantaneous power theory, a novel definition of SSO power is proposed to characterize its propagation. The SSO power contains both DC power components and AC power components. Utilizing SSO power, SSO propagation is quantitatively studied in single oscillation source systems, and further studied in multiple oscillation sources systems. Theoretical analysis reveals that in addition to the recognized impact of line impedance, power flow also affects SSO power propagation significantly. Hence, propagation impact factor is proposed for the determination of the dominant influencing element. To reveal SSO power propagation paths in a network, shunt coefficients of DC power components and AC power components are expressed respectively. Test cases under different operating conditions and a practical case are carried out to demonstrate analysis and conclusions in this paper.

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Defining SSO Power and Characterizing SSO Propagation in Power System with Wind Farms Integration

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