  Cross-border Electric Interconnection towards renewables is a promising
solution for electric sector under the UN 2030 sustainable development goals
which is widely promoted in emerging economies. This paper comprehensively
investigates state of art in renewable resources and cross-border electric
interconnection in South America. Based on the raw data collected from typical
countries, a long-term scenario forecast methodology is applied to estimate key
indicators of electric sector in target years, comparing the prospects of
active promoting cross-border Interconnections Towards Renewables (ITR)
scenario with Business as Usual (BAU) scenario in South America region. Key
indicators including peak load, installed capacity, investment, and generation
cost are forecasted and comparative analyzed by year 2035 and 2050. The
comparative data analysis shows that by promoting cross-border interconnection
towards renewables in South America, renewable resources can be highly utilized
for energy supply, energy matrix can be optimized balanced, economics can be
obviously driven and generation cost can be greatly reduced.
