*Article* **Changing the Day-Ahead Gate Closure to Wind Power Integration: A Simulation-Based Study**

### **Hugo Algarvio 1,2,\*, António Couto 1, Fernando Lopes 1 and Ana Estanqueiro 1**


Received: 5 June 2019; Accepted: 16 July 2019; Published: 18 July 2019

**Abstract:** Currently, in most European electricity markets, power bids are based on forecasts performed 12 to 36 hours ahead. Actual wind power forecast systems still lead to large errors, which may strongly impact electricity market outcomes. Accordingly, this article analyzes the impact of the wind power forecast uncertainty and the change of the day-ahead market gate closure on both the market-clearing prices and the outcomes of the balancing market. To this end, it presents a simulation-based study conducted with the help of an agent-based tool, called MATREM. The results support the following conclusion: a change in the gate closure to a time closer to real-time operation is beneficial to market participants and the energy system generally.

**Keywords:** day-ahead market; balancing market; gate closure; forecast uncertainty; wind power forecast; agent-based simulation; the MATREM system
