Power development planning considering power plant response to load change

Abstract

As Thailand's electricity demand increases, the country's power supply must meet this new demand. An increasing portion of energy production from renewables will lead to a drastic change in net demand characteristic on traditional power supplies. If the overall power plants in the system cannot respond to this fluctuating and uncertain demand, it may cause generation demand to be unbalanced and lead to system instability. Therefore, this paper proposes a new power development planning method that considers power plant response to load change. The key factor determining whether a power grid requires a new plant are reliability indexes such as Loss of Load Expectation (LOLE) and Reserved Margin (RM). Then type of power plants suited for different load demand patterns is identified. To illustrate the advantage of the proposed method, new power development plan (PDP) done by the proposed method is then compared to the Thailand's current plan, PDP2015.