This chapter develops a modeling framework for studying the impact of variability and uncertainty in wind-based electricity generation on power system frequency. The focus is on time-scales involving governor response (primary frequency control) and automatic generation control (AGC) (secondary frequency control). The framework includes models of synchronous generators, wind-based electricity sources, the electrical network, and the AGC system. The framework can be used to study the impact of different renewable penetration scenarios on system frequency performance metrics. In order to illustrate the framework, a simplified model of the Western Electricity Coordinating Council (WECC) system is developed.
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