Abstract
Reserve margin is one of the key criteria when developing a Power Development Plan (PDP). It represents reliability level of generation system. Typically the reserve margin is defined as percentage of additional generation over system peak load, reserved for any unexpected event in the future, e.g. unplanned outage of a power plant. Currently, Thailand set 15% as the minimum reserve margin when developing a PDP. It is expected that the higher reserve margin should yield the higher reliability level. However, stronger relationship between the reserve margin and the reliability level should be clearly investigated. This paper proposes a method to link between these two measures, systematically. The reliability level is represented through loss of load expectation (LOLE). The generation and demand data of Thailand during 2018 - 2036 is used as a test system.
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