Semi-variance of risk decision-making for purchasing electricity in multi-market

Aiming at the choices and risk management that electricity purchasers will face to purchase power in four markets under the framework of the electricity market. This paper, which uses semi-variance to measure risk, has established two risk decision-making models based on restrictive and non-restrictive buy /sell through risks measured by semi-variance. Meanwhile, it proposes to minimize the risks on the basis of historic data and practical statistical genetic algorithms under the premise of benefit guarantee.