Researches On Spot Price In Electricity Market

The Spot Price is becoming a more and more important subject in the electricitymarkets, with the fast development of the electricity markets. This paper presents thepreliminary analysis and research about the rich rich economic information includedin Spot Price, how to response system operation and algorithm adapted Spot Pricerapid calculation on line.This paper first introduces the domestic and abroad Electricity Markets andelectricity price of Electricity Markets.Secondly, the model and algorithm of OptimalPower Flow is described.Then a optimization tool—Optimal Power Flow is appliedin the calculattion of Spot Price.The model of Spot Price based on Primal-dualinterior point algorithm is introduced. It is discussed that the value of centralparameter effecting on the convergence of the primal-dual interior point algorithm,based on which a predictor-corrector technology is adopted to enhance theconvergence by coordinating the optimality and feasibility.In the end,it is finishedthat the calculation of 5-bus system and IEEE14-bus system Spot Price,thediscussion of Spot Price based on rich economic information of algorithm'sLagrangian multiple and the analysis of algorithm's calculation performance.It drawsome important conclusions.The calculation and analysis illustrate that:marginal costof active power is much greater than the marginal cost of reactive power; minimizingthe cost of fuel in the system, the system is not necessarily the most security; thevalue of Lagrangian multiple of the relevant inequality constraint meaning the secureprice of the system operating and the predictor-corrector algorithm's less iterativetimes and better convergence etc.