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Bruno Pinheiro
Faculdade de Engenharia Elétrica, Universidade Estadual de Campinas, SP
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Lucas Lugnani
Faculdade de Engenharia Elétrica, Universidade Estadual de Campinas, SP
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Daniel Dotta
Faculdade de Engenharia Elétrica, Universidade Estadual de Campinas, SP
Keywords:
Inertia estimation, frequency stability, center of inertia, power system stability, system identification
Abstract
The inertial response is crucial to the stable operation of the modern power systems. In this paper, an approach based on syncrophasors during ringdown and ambient operation is proposed to estimate the regional inertia. As a sub-product of the proposed procedure, the damping coefficient can be estimated. The proposed approach is based on the system identification of a ARMAX model using a selected pilot-bus, that properly reflect the frequency of the center of inertia (COI) of each region, and the power variations within at region. The approach is tested in the IEEE 68-bus system during disturbed and ambient operation.
