Abstract
This work involves frequency control of electricity grid under the integration of renewable generation. Pumped storage hydro (PSH) is proposed to provide compensation for variable generation of renewable sources. PSH is in generating (pumping) mode when there is a power shortage (excess) caused by renewable generation. To maintain the ability of frequency control, the allowable variation level of renewable generation is considered. The solution method is tested with the PSH unit at Bhumibol dam, a hydro power plant of The Electricity Generating Authority of Thailand (EGAT). It is found that the role of PSH on frequency control in pumping mode is more obvious than in generating mode.
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