A Robust Optimal Coordination Scheduling Method for AC-DC Hybrid Microgrid

Abstract

Disclosed is a robust optimal coordinated dispatching method for an alternating-current and direct-current hybrid micro-grid. The method comprises the following steps: step 10) acquiring source load prediction data and creating an uncertainty set; step 20) acquiring an objective function of an optimal dispatching model; step 30) creating constraint conditions of the optimal dispatching model; and step 40) solving a robust optimal dispatching problem: using a column constraint generation algorithm to solve a robust optimization problem to obtain a robust coordinated operation manner of an alternating-current and direct-current hybrid micro-grid. The method takes the uncertainty of multiple source loads in an alternating-current and direct-current hybrid micro-grid into consideration, can realize the robost optimal dispatching of the alternating-current and direct-current hybrid micro-grid and provides guidance and assistance to work out an operation manner of the alternating-current and direct-current hybrid micro-grid.

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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