Abstract
The purpose of this paper is to explore the role of Battery Energy Storage System (BESS) in improving the frequency response of a low inertia power system. For the recent years, prolific amount of renewable energy resources that include wind and photovoltaic (PV) sources have been introduced in South Australian power system. These wind generators are mostly variable speed machines, hence they neither have inertia response nor can they perform governor like response following a contingency. The demand in South Australia can be significantly catered utilizing renewable sources and considerable power import from the adjacent state Victoria. Therefore, the number of synchronous generators in the South Australian network can be small. In such situations, the frequency response following a contingency can be concerning and the network may undergo substantial under frequency load shedding. To overcome this challenge, this paper proposes a frequency responsive BESS model to improve the frequency response of a low inertia power system that resembles the South Australian network. The network is investigated under various operating conditions to explore the performance of BESS regarding frequency response enhancement.
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