Multi-energy short-term economic dispatching method and system based on differential-gradient evolution

Abstract

The invention discloses a multi-energy short-term economic dispatching method and system based on differential-gradient evolution and belongs to the field of multi-energy optimization dispatching. Themethod comprises steps that for power grids including a wind power plant, a hydropower station and a thermal power unit, a model is built at the minimum coal-fired cost of the thermal power unit on the premise of considering the valve point effect, and model constraints are set; the wind speed is utilized to calculate output of the wind power plant, and output of the hydropower station is calculated through utilizing the inbound flow; output of the thermal power unit is utilized as a decision variable, based on the output of the wind power plant and the output of the hydropower station, the model constraints are utilized to compress the decision space; iterative evolution is performed through utilizing a differential-gradient algorithm in the decision space to obtain the best output of the thermal power unit, and the output of the wind power plant, the output of the hydropower station and the optimal output of the thermal power unit are combined to obtain a scheduling plan of the power grid. The method is advantaged in that the method is not easy to fall into local optimum and can solve a technical problem of dynamic economic dispatching of a multi-energy mutual aid coordination system.

Description

technical field [0001] The invention belongs to the field of multi-energy optimal scheduling, and more specifically relates to a multi-energy short-term economic scheduling method and system based on differential-gradient evolution. Background technique [0002] The traditional multi-energy dynamic economic dispatch problem only includes thermal power units or large and medium-sized hydropower stations. However, in the actual operation of thermal power units, when the steam turbine inlet valve suddenly opens, there will be a wire drawing phenomenon, that is, the "valve point effect", which makes the dynamic economic dispatch target The cost function of thermal power has a series of non-differentiable points, which makes the traditional evolutionary algorithm easy to fall into local optimum in the process of solving the optimization scheduling model. [0003] In addition, with the rapid increase in the number of wind power plants and hydropower stations, and the increasing nu...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a multi-energy short-term economic scheduling method and system based on differential-gradient evolution, thereby solving the existing problems in the prior art that are easy to fall into local optimum and difficult to solve multi-energy interaction. Technical Problems of Dynamic Economic Dispatch in Economic Coordination System

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