Who should pay for frequency-containment ancillary services? Making responsible units bear the cost to shape investment in generation and loads
arxiv(2023)
摘要
While the operating cost of electricity grids based on thermal generation was
largely driven by the cost of fuel, as renewable penetration increases,
ancillary services represent an increasingly large proportion of the running
costs. Electric frequency is an important magnitude in highly renewable grids,
as it becomes more volatile and therefore the cost related to maintaining it
within safe bounds has significantly increased. So far, costs for
frequency-containment ancillary services have been socialised in most
countries, but it has become relevant to rethink this regulatory arrangement.
In this paper, we discuss the issue of cost allocation for these services,
highlighting the need to evolve towards a causation-based regulatory framework.
We argue that parties responsible for creating the need for ancillary services
should bear these costs. However, this would imply an important change in
electricity market policy, therefore it is necessary to understand the impact
on current and future investments on generation, as well as on electricity
tariffs. Here we provide a mostly qualitative analysis of this issue, defining
guidelines for practical implementation and further study.
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