Virtual power plant stratified random optimized dispatching method

Abstract

The invention discloses a virtual power plant stratified random optimized dispatching method. First, a virtual power plant two-layer coordinated optimization dispatching model which comprises an upper layer virtual power plant layer and a lower layer micro power grid layer is established, wherein micro power grid optimized dispatching models in the lower layer are chance constraint models, in the models, an empirical distribution function is used for describing the power-out probability distribution of an uncontrollable micro power supply in an independent state, and according to the uncontrollable micro power supply, a histogram is combined to select a Copula function to establish a joint probability distribution model. Then, a sampling average approximation method and a KKT optimality condition are used for converting the virtual power plant two-layer coordinated optimization dispatching model to a single-layer deterministic model to be solved, and optimal dispatching is carried out on a virtual power plant. According to the method, coordinated operation of a plurality of micro power grids in the virtual power plant can be considered at the same time, probability distribution and Copula correlation analysis can be used for fully considering the influence of uncontrollable micro power supply randomness and correlation on optimized dispatching, and virtual power plant coordinated random optimized dispatching can be achieved.

Description

technical field [0001] The invention belongs to the technical field of electric power optimization dispatching, and relates to a layered random optimization dispatching method of a virtual power plant. Background technique [0002] The continuous growth of world energy consumption and the increasing environmental pollution have promoted the widespread use of distributed power. However, with the large-scale access of distributed power, how to operate and manage a large number of distributed power with different ownerships is a difficult problem for the promotion and application of green energy. Virtual power plant provides a realistic and feasible solution for distributed power operation management. The virtual power plant can make distributed power generation better integrated into the smart grid and participate in the transaction of the power market and the dispatch of the power system. [0003] The virtual power plant integrates multiple distributed distributed power sou...

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Problems solved by technology

Moreover, for the optimal scheduling of virtual power plants with multiple microgrids, the coordinated operation among multiple microgrids needs to be considered, and the existing research is rarely or basically not involved in the optimal scheduling of virtual power plants with multiple microgrids.

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