The Future Role of Hydro Plant in Maximising the Integration of Wind Generation

Abstract

This paper describes the changing role of hydro-electric generation in Tasmania in the presence of expanding wind energy developments. Whereas hydro generators have traditionally been dispatched on the premise of satisfying energy requirements, with other power system security functions including voltage control, frequency control, fault current contribution, inertia etc largely satisfied by default, analysis suggests that hydro generators will need to be utilised more deliberately for their ancillary service capabilities if high levels of wind penetration are to be realised in Tasmania. This paper presents a selection of design modifications currently being investigated for existing hydro plant which are aimed at extending certain ancillary service capabilities, while minimising impacts on water storage strategies. Discussions include trade-offs that exist under such operational regimes, as well as the need for revised market arrangements necessary to adequately compensate generators for their role as renewable energy facilitators.