Aneel Delays Vote on Curtailment Rules After Director's Request

Overview

• The agency's board suspended a final decision after director Fernando Mosna asked for more time during an extraordinary meeting, a move that halted the relator's vote on Monday.
• Relator Agnes da Costa had proposed keeping micro and minigeneration (MMGD) outside the curtailment rules and starting the rule immediately with a one‑year shadow operation to test calculations without immediate financial effects.
• Mosna said key technical items lack clear numbers, notably EVT, which is energy that is spilled or turbinated without commercial dispatch, and GHmin, the minimum hydraulic generation required for external uses such as water supply or flood control.
• The proposal groups solar, wind and hydro for post‑cut accounting and would use provisional source‑by‑source split during the shadow year, but the MMGD exclusion drew pushback from large generators that say distributed solar affects overproduction in peak hours.
• The debate traces back to Public Consultation 45 from 2019 and comes as MMGD has grown rapidly, topping about 45 GW in 2025, a scale that raises operational challenges for the transmission operator and questions about who should bear financial effects of cuts.