An interconnected electric power system is a complex system that must be operated within a safe frequency range in order to reliably maintain the instantaneous balance between generation and load. This is accomplished by ensuring that adequate resources are available to respond to both expected and unexpected imbalances, and restore frequency to its scheduled value in order to ensure uninterrupted electric service to customers.
As part of its responsibility to oversee the reliability of the nation’s bulk power system, the Federal Energy Regulatory Commission (FERC) staff commissioned Lawrence Berkeley National Laboratory (LBNL) to study how a critical aspect of reliability — the control of power system frequency during the period immediately following the sudden loss of a large conventional power plant –can be better measured to assess the adequacy of frequency control in the interconnections currently and can be used to manage the reliable integration of new resources, including variable renewable generation.
This talk will present selected aspects of LBNL’s report to FERC, including an overview of power system frequency control and frequency response concepts, the impacts of increased variable renewable generation on frequency response, findings from dynamic simulations of the frequency response of U.S. interconnections with varying amounts of both variable renewable generation and operating reserves, and the study’s recommendations.
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