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A Normal Form-Based Power System Out-of-Step Protection

Journal Article · · Electric Power Systems Research

This paper proposes a new system-level application for monitoring out-of-step (OOS) events in power systems. As already known, amplitude-dependent frequency shift is a nonlinear phenomenon of electromechanical oscillations under large disturbances. The frequency shift indicates the system's nearness to instability. This new tool utilizes the Normal Form method to identify the named phenomenon, leading to accelerated OOS detection. The proposed strategy is illustrated and compared to the equal-area criterion method in a single-machine-infinite-bus power system. Extensive tests on IEEE 3- and IEEE 50-machine power systems prove the efficacy and potential of the proposed method for online warnings of instability and ranking of vulnerable system modes.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE National Renewable Energy Laboratory (NREL)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1854135
Report Number(s):
NREL/JA-5C00-80262; MainId:42465; UUID:bb0f2485-7f10-4da9-b258-b24ef981a735; MainAdminID:63972
Journal Information:
Electric Power Systems Research, Journal Name: Electric Power Systems Research Vol. 208
Country of Publication:
United States
Language:
English

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