Abstract
Variable and non-programmable resources, such as solar and wind, have undergone a stunning growth in recent years and are likely to gain even more importance in the future. Their strong presence in the national electricity mix has created issues in many countries regarding the secure operation of the power system. In order to guarantee the stability of the system, several TSOs have resorted to wind energy curtailment, which represents a waste of clean energy and an economic loss. In order to analyze this issue, a model of the Italian power system was developed, a program able to simulate the electricity dispatching mechanism. The model was, then, used to evaluate possible solutions to reduce wind curtailment. In particular, a proposal for the construction of an HVDC line linking Southern and Northern Italy was studied.
Highlights
The search for clean and politically stable energy resources has lead in recent decades to the rather fast development of RES (Renewable Energy Sources) [1]
Among the renewable energy sources, the widest share is associated with hydro with
The simulation allows analysis of the effects that the corridor has on the power system and, on the wind curtailment issue
Summary
The search for clean and politically stable energy resources has lead in recent decades to the rather fast development of RES (Renewable Energy Sources) [1]. PV and wind are, variable and non-programmable sources of energy, since their production relies on weather conditions that are inherently unstable [4,5]. This poses a problem for the operation of the electric system, where injections and withdrawals of electricity have to be balanced at any instant of time. When a secure balancing is not feasible or other constraints arise, System Operators are forced to curtail RES generation. This wastes clean and free energy, producing environmental and economic damage. Wind curtailment is determined by two main causes: transmission constraints and grid stability issues [7,8,9]
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