METHOD OF ANALYZING DETERMINANT FOR CONTRACT PRICE IN ELECTRIC POWER TRANSACTION MARKET AND COMPUTER PROGRAM FOR ANALYSIS

摘要

PPROBLEM TO BE SOLVED: To quantitatively evaluate factors of an electric power system such as bidding information and voltage constraint, by analyzing factors for deciding a contract price in an electric power transaction market. PSOLUTION: In an electric power system 1, an optimum solution and its dual solution of single price auction maximizing the value of a target function are found which satisfies an equation constraint condition comprising a tidal flow equation and a supply-demand balance relational expression, and an inequality constraint condition comprising the bounds pair of valid/invalid electric power, the bounds pair of voltage and the bounds pair of tidal flow, and shows the social surplus of all electric power suppliers (12 and 14) and customers (13 and 15). On the basis of the optimum solution and a bidding function, a contract price determining bus is searched for to divide the equation constraint condition and the inequality constraint condition into a valuable constraint condition and a valueless constraint condition, and voltage sensitivity in the contract price determining bus is calculated, so that the contract price is decomposed into a linear polynomial equation composed of terms related to each of consumption cost, power generation cost, the bidding function, the equivalent value of the valuable constraint condition and the bounds pair of constraints of the amount of bidding. PCOPYRIGHT: (C)2006,JPO&NCIPI