Equality constraint processing method for dynamic economical scheduling of wind-driven, water-driven and thermal-power-driven electric power system

Abstract

An equality constraint processing method for dynamic economical scheduling of a wind-driven, water-driven and thermal-power-driven electric power system comprises the following steps of 1, establishing an equality constraint in a dynamic economical scheduling model of the wind-driven, water-driven and thermal-power-driven electric power system, screening out candidate solutions which are generated by an optimizing algorithm in current iteration and do not satisfy the equality constraint, calculating an equality constraint violation amount of the candidate solutions, and determining a total power adjusting amount of the system; 2, setting a system total power upward-adjusting and downward-adjusting principle which comprises an output adjusting sequence of each power generator set and a system total power adjusting amount distributing principle; and 3, distributing the system total power adjusting amount according to the system total power upward-adjusting and downward-adjusting principle which is set in the step 2, and obtaining an output value of each power generator set, wherein the output value of each power generator set satisfies the equality constraint. The equality constraint processing method settles a problem of solving efficiency and convergence reduction caused by incapability of satisfying the equality constraint in solving a dynamic economical scheduling problem in solving a dynamic economic scheduling problem of the power system in prior art.

Description

technical field [0001] The invention belongs to the technical field of electric power system economic dispatching, and relates to an equality constraint processing method for dynamic economic dispatching of wind, water and thermal power systems. Background technique [0002] Power system dynamic economic dispatch is a mathematical optimization problem, which has the characteristics of nonlinearity, multiple constraints, high dimensionality, strong coupling, etc., and its solution is very complicated. Due to the large number of scheduling objects involved in the dynamic economic dispatching of power systems with wind, water and fire, and the large differences in the operating characteristics of different energy sources, the difficulty of solving and the amount of calculation increase dramatically. At present, a large number of intelligent optimization algorithms have been used to solve the dynamic economic dispatch of power systems, and the development of new algorithms is al...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an equality constraint processing method for the dynamic economic dispatch of the wind, water and thermal power system, which solves the problem that the algorithm existing in the prior art can not be satisfied due to the equality constraint and affects the solution efficiency when solving the dynamic economic dispatch problem of the power system and convergence issues

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