Abstract
Routing of high-voltage electric transmission lines for the connection of renewable energy-distributed generation plants is a critical issue from an environmental point of view. A standard methodology that accounts for multiple perspectives, influence factors and is able to mediate between weighted constraints can be a useful tool for the regulating bodies that are involved in approval processes. The methodology can be an effective support to increase reliability, save consumers' money and mitigate the unavoidable impacts of the lines on the population living nearby. In this paper we investigate the suitability of a procedure employed by Terna, the Italian high-voltage transmission system operator, to identify the corridors where to route new overhead transmission lines with the lowest environmental impact. The methodology is based on the subdivision of all the relevant constraints dictated by environmental issues and territory legislations in four main classes. A real case study concerning the design and connection of a wind farm placed near Collarmele, in the center of Italy, shows the effectiveness of the proposed methodology.
Highlights
A standard methodology that accounts for multiple perspectives, influence factors and is able to mediate between weighted constraints can be a useful tool for the regulating bodies that are involved in approval processes
The GSE, the state-owned company which promotes and supports renewable energy sources in Italy with the Italian Regulatory Authority for Electricity, Gas and Water (AEEG) estimated on December 2011 that nearly 250,000 connection requests had been accepted on April 2011, corresponding to about 196 GW of power
This is a clear evidence that the authorization process was, and still is, a decisive step for the construction of a new plant for renewable energy generation
Summary
Governments and companies are investing large efforts in developing technologies to improve clean renewable energy sources [3, 6] due to several economic and environmental reasons [1, 4, 5, 7, 12, 17, 24, 29, 31, 32]. The operator can manually lower or rise this value on some portions of the AUS (always remaining inside the allowed range) according to specific prescriptions established through collective bargaining talks between the government, regulating bodies and unions This is done to try to force the route of the new power lines in some portions of the territory, trying to accommodate to some requirements. Once the new SS is placed, the program searches for the lowest environmental impact corridor to route the new power line This procedure enables considering all the constraints that are present over the AUS, yielding a corridor which is a function of all the co-present criteria, both those which are more stringent (higher weights) and taking into account those with lighter weighs.
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