A Risk Investment Portfolio Optimization Model of Energy Efficiency Power Plant Based on Mean Semi-Variance Theory in Low-Carbon Economy Environment

The risk investment portfolio optimization of energy efficiency power plant under various electricity-saving measures in low carbon economy environment is researched.Considering the fact that in low carbon economy environment the income of energy efficiency power plant constitutes by two parts,namely the income from selling electricity and that from the transaction in carbon market,so following risks should be considered during the investment portfolio optimization of energy efficiency power plant: the risk of price fluctuation of electricity to be sold,the risk of price fluctuation of carbon transaction and the risk of fluctuation of electricity-saving.To ensure the correctness of decision-making,the mean semi-variance(MSV) is utilized to replace traditional variance theory to measure the degrees of these risks.Analysis on results of calculation example shows that the income from carbon transaction has a big contribution to overall profit level,and MSV theory can incarnate the risk degree that the investors will encounter better than traditional variance theory and more contributes to rational decision-making.