Robust optimization coordinated scheduling method for alternating current-direct current hybrid microgrid

Abstract

The invention discloses a robust optimization coordinated scheduling method for an alternating current-direct current hybrid microgrid. The method comprises the following steps: step 10) source load prediction data are acquired, and an uncertainty set is constructed; step 20) the objective function of an optimal scheduling model is obtained; step 30 ) the constraint conditions of the optimal scheduling model are established; and step 40) a robust optimization scheduling problem is solved: a column constraint generation algorithm is adopted to solve the robust optimization problem, and the robust coordinated operation mode of the alternating current-direct current hybrid microgrid is obtained. According to the method, a plurality of source load uncertainties in the alternating current-direct current hybrid microgrid are considered; the robust optimal scheduling of the alternating current-direct current hybrid microgrid can be realized; and guidance and assistance can be provided for theformulation of the operating modes of the alternating current-direct current hybrid microgrid.

Description

technical field [0001] The invention belongs to the technical field of micro-grid optimization scheduling and energy management, and specifically relates to a method for robust optimization and coordination scheduling of AC-DC hybrid micro-grids. Background technique [0002] Due to the depletion of fossil energy and its high pollution to the ecological environment, natural resources represented by wind energy and solar energy have attracted widespread attention for their clean and renewable characteristics. At present, more and more renewable energy power generation is connected to the power grid. As a small autonomous system that gathers distributed power generation, energy storage and load, microgrid has become an effective technology and an important way to rationally utilize renewable energy in the field of power system. In order to ensure the economical and reliable operation of the microgrid, it is necessary to manage the energy of the microgrid. According to the for...

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Problems solved by technology

[0003] The influence of renewable energy by natural conditions is random and intermittent, and the load fluctuation is strong, which leads to more uncertainties in the microgrid, which brings great challenges to the optimal scheduling of the microgrid.

As a new type of microgrid structure, the AC-DC hybrid microgrid connects the AC bus and the DC bus through a bidirectional converter, and realizes the divisional power supply of AC and DC. They all use stochastic optimization methods, but less robust optimal scheduling, and have not fully considered the operating costs, operating characteristics and related constraints of each unit in the AC-DC hybrid microgrid.

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