Abstract
To improve the cost-effectiveness, a merit-order (MO) based load frequency control (LFC) will be applied in Japan, in which the control signals to LFC units would not be in phase with each other unlike conventional LFC using ramp-rate-based signal dispatch. As a result, large frequency deviations may occur due to large fluctuations of renewable power resources. To improve the control performance of MO-based LFC, our previous study proposed a MO-based LFC considering the change direction of area control error. This study assesses the effect of using Battery Energy Storage Systems (BESS) in the proposed LFC. The numerical simulation results show that not only the control performance but also the cost-effectiveness are improved when BESS is placed in the middle of MO-list because BESS effectively works to mitigate the remaining control error after performing the LFC units of higher priority.
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