Abstract
The application of battery energy storage (BES) in microgrid systems has attracted much attention in recent years. It is because the BES is able to store excess power and discharge its power when needed. In islanded microgrid systems, BES is starting to be considered as a unit that can regulate the system frequency. The control used in the BES to display frequency regulation performance is called load-frequency control (LFC). However, this participation resulted in the large size of the battery and high expansion planning cost. In this paper, an advanced LFC control that has frequency limitation compared to traditional LFC is proposed. The proposed control implies droop control as the base and has frequency limitations. Compared to the traditional LFC, the proposed control can reduce the system expansion planning costs. A performance simulation was done to validate battery performance. The results of the numerical simulation showed that the proposed control participated in reducing the operation cost. It directly led to a reduction in the expansion planning cost. A study of battery selection was conducted to draw the practicality of the BES sizing solutions.
Highlights
Theimplementation higher capacity battery canoptimization operate much in longer due to sysIn this paper, advanced microgrid the allowed operating cycles. It leads to an increasing expansion cost, which was tems has been introduced
A set of operation cases were simulated in the model to assess the battery energy storage (BES) operation
It was found that the proposed load-frequency control (LFC) reduces the expansion planning cost
Summary
A control scheme using the optimal sizing of BES-based particle swarm optimization (PSO) with a load shedding scheme to improve the grid frequency after islanding occurred was proposed [18]. This method introduces the optimal relationship of BES sizing with frequency control. It is necessary to study the frequency control contained in BES in the islanded microgrid scope and aims to show the method can bring merits to the operation cost and BES size. This paper proposes a BES sizing that implements a frequency regulation function by utilizing advanced load-frequency control (LFC).
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