Orderly power curtailment and energy storage

Can energy storage reduce curtailment?

A key element of using energy storage to integrate renewable energy and reduce curtailment is identifying the timescales of storage needed—that is, the duration of energy storage capacity per unit of power capacity.

Can energy storage devices avoid curtailment?

The ability to avoid curtailment is a function of both the power and energy capacities of the energy storage device. We perform simulations with varying energy storage sizes to examine curtailment reduction with a focus on the role of duration.

Why is energy storage important in bulk power systems?

However, the centralised utilisation of renewable energy in bulk power systems is impeded mainly by its volatile nature and transmission congestion, leading to the spillage of renewable power. The energy storage unit is expected to be a promising measure to smooth the output of renewable plants and reduce the curtailment rate.

Which energy storage technologies can avert renewable curtailment?

The figures show that with relatively low emissions taxes (i.e., $50 per ton or less), PHS and CAES are the only economically viable technologies for averting renewable curtailment. However, with higher emissions taxes, all of the energy storage technologies (except for Li-ion batteries) become cost-effective for this application.

Can battery energy storage reduce wind power curtailment?

In the area of optimal sizing, an optimisation model of battery energy storage (BES) capacity is developed in [ 8] to decrease wind power curtailment in grid-connected wind farms; the cost induced by the equipment of BES, as well as power loss, is considered and the wind power curtailment is penalised in the objective function.

What is a distributionally robust sizing energy storage model?

(i) A distributionally robust model for optimal sizing energy storage is established; it aims to guarantee a DRCC on renewable energy curtailment rate with the minimal investment cost. A linear network model with reactive power and voltage is adopted. It better captures the operating status of the power system.