Risk-Based Model for Cogeneration Resource Planning

This paper focuses on the application of risk-based models to cogeneration system planning in the presence of uncertainties. Starting from the electrical and thermal load patterns, and the electricity and gas prices for a reference year, the uncertain variables for the successive years of analysis (demand and energy prices) are represented by using average values and covariance matrices, taking into account their possible correlations. A multi-year planning analysis is carried out by means of Monte Carlo simulations, calculating the probability distributions of the net present costs. The same procedure is repeated by considering the base case of separate production and a number of alternatives using internal combustion engines of different size. Post-processing of the net present costs is run according to risk-based concepts, by formulating a composite objective function that takes into account a weighted sum of the average value and of a risk-based component. Hence, instead of evaluating only average cases or the limit cases (best or worst cases), the results obtained from the risk-based calculations provide useful indications for the decision makers, taking into account different degrees of risk attitude of the decision maker.

[1]  R. Schultz,et al.  Algorithms for mean-risk stochastic integer programs in energy , 2006, 2006 IEEE Power Engineering Society General Meeting.

[2]  Michele Trovato,et al.  Supplier risk analysis in the day-ahead electricity market , 2006 .

[3]  G. Chicco,et al.  A Decision Theory Approach to Cogeneration Planning in the Presence of Uncertainties , 2007, 2007 IEEE Lausanne Power Tech.

[4]  M. F. McCoy,et al.  Managing risk in the new power business , 2000 .

[5]  Manuel A. Matos,et al.  Decision under risk as a multicriteria problem , 2007, Eur. J. Oper. Res..

[6]  Chi-Keung Woo,et al.  Managing electricity procurement cost and risk by a local distribution company , 2004 .

[7]  Vladimiro Miranda,et al.  Probabilistic choice vs. risk analysis-conflicts and synthesis in power system planning , 1997 .

[8]  George J. Anders,et al.  Probability Concepts in Electric Power Systems , 1990 .

[9]  Socrates Kypreos,et al.  Internalisation of external cost in the power generation sector: Analysis with Global Multi-regional MARKAL model , 2007 .

[10]  R. Rockafellar,et al.  Optimization of conditional value-at risk , 2000 .

[11]  NATURAL GAS AND ENERGY PRICE VOLATILITY , 2003 .

[12]  Julia L. Higle,et al.  Managing risk in the new power business: a sequel , 2002 .

[13]  Fouad Al-Mansour,et al.  Risk analysis for CHP decision making within the conditions of an open electricity market , 2007 .

[14]  J. R. San Cristóbal,et al.  Investment criteria for the selection of cogeneration plants¿a state of the art review , 2006 .

[15]  Vladimiro Miranda,et al.  Why risk analysis outperforms probabilistic choice as the effective decision support paradigm for power system planning , 1998 .

[16]  R. Masiello,et al.  Managing market risk in energy , 2003 .

[17]  Chen-Ching Liu,et al.  Risk assessment in energy trading , 2003 .