A New Indicator of Transient Stability for Controlled Islanding of Power Systems: Critical Islanding Time

Zhenzhi Lin, Yuxuan Zhao, Shengyuan Liu, Fushuan Wen, Yi Ding, Li Yang, Chang Han, Hao Zhou and Hongwei Wu
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Zhenzhi Lin: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yuxuan Zhao: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Shengyuan Liu: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Fushuan Wen: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Yi Ding: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Li Yang: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Chang Han: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Hao Zhou: School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Hongwei Wu: State Grid Zhejiang Ningbo Power Supply Company, Ningbo 315000, China

Energies, 2018, vol. 11, issue 11, 1-10

Abstract: Transient stability after islanding is of crucial importance because a controlled islanding strategy is not feasible if transient stability cannot be maintained in the islands created. A new indicator of transient stability for controlled islanding strategies, defined as the critical islanding time (CIT), is presented for slow coherency-based controlled islanding strategies to determine whether all the islands created are transiently stable. Then, the stable islanding interval (SII) is also defined to determine the appropriate time frame for stable islanding. Simulations were conducted on the New England test system–New York interconnected system to demonstrate the characteristics of the critical islanding time and stable islanding interval. Simulation results showed that the answer for when to island could be easily reflected by the proposed CIT and SII indicators. These two indicators are beneficial to power dispatchers to keep the power systems transiently stable and prevent widespread blackouts.

Keywords: controlled islanding; power system stability; transient stability; critical islanding time; critical clearing time; stable islanding interval (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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