Source network load storage cooperative scheduling method under new energy coupling background

Abstract

The invention provides a source-grid-load-storage cooperative scheduling method under a new energy coupling background. The method comprises the following steps: taking the expectation of the lowest power grid operation cost in a future scheduling period as a target function; generating an approximate value function of the new energy unit and the user load, and constructing a scheduling model of source-network load-storage collaboration in combination with the target function; obtaining prediction data of new energy unit output and user load, and inputting the prediction data into the scheduling model for solving; iteratively updating the approximate value function, importing the iteratively updated approximate value function into the scheduling model for iterative solution, and stopping iteration until a solution result meets a preset convergence condition; and taking the solving result of the last iteration as a scheduling strategy of the new energy unit and the user load. By means of the approximate dynamic programming technology, time-phased approximate dynamic programming is carried out on scheduling expectation based on a value function, operation on expected values in an existing scheduling model is eliminated, and the influence of uncertain factors on the stability of a power grid system is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of electric power system dispatching, and in particular relates to a source-network-load-storage coordinated dispatching method under the background of new energy coupling. Background technique [0002] In the future, in the new power system with new energy as the main body, the wide application of new energy storage systems represented by hydrogen storage will greatly improve the level of grid connection and consumption of new energy, and will show the characteristics of synergy between source, network, load and storage. Improve the dynamic balance capability of the power system economically, efficiently and safely, so as to realize the maximum utilization of energy resources. However, the uncertainty factors that need to be considered to maintain the stability of the power system and economic operation also increase, which affects the accuracy of dispatching strategies. Contents of the invention [0003...

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Problems solved by technology

However, the uncertain factors that need to be considered to maintain the stability of the power system and economic operation also increase, which affects the accuracy of dispatching strategies

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