Economic dispatch of AC/DC microgrid based on multi-interval uncertainty robust optimization

Abstract

The present invention discloses an alternating current / direct current microgrid economical dispatching method based on multi-interval nondeterminacy and robust optimization. The method comprises the following steps of: the step 10) obtaining nondeterminacy prediction parameters, and distributing a nondeterminacy time period budget number; the step 20) based on the step 10), constructing a multi-interval nondeterminacy set; the step 30) obtaining an operation cost coefficient and an operation limiting value of each device in the microgrid, and based on the step 20), establishing a robust optimization economical dispatching model of an alternating current / direct current microgrid; and the step 40) solving a robust economical dispatching problem: employing a column constraint generating algorithm to perform iteration solution of the optimization problem, and obtaining the robust operation plan of the alternating current / direct current microgrid. The alternating current / direct current microgrid economical dispatching method can improve the economic benefit of microgrid operation and can improve the important reference for formulation of an operation plan of the alternating current / direct current microgrid.

Description

technical field [0001] The invention belongs to the technical field of energy management and economic dispatching of microgrids, and specifically relates to an economic dispatching method for AC / DC microgrids based on multi-interval uncertainty robust optimization. Background technique [0002] Traditional fossil energy-based power generation has brought great pollution to the natural environment. Therefore, more and more renewable clean energy is connected to the power system through microgrids, and the penetration rate of renewable energy in the grid is gradually increasing. However, the volatility and uncertainty of renewable energy are very strong. In order to ensure the stable and efficient operation of the microgrid, it is necessary to optimize the scheduling of the microgrid to formulate a reasonable operation plan and realize the integration of traditional units, renewable generators and energy storage equipment. Coordinated operation. [0003] There are uncertainti...

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Problems solved by technology

Existing robust optimization studies have constructed a single-interval uncertainty set based on the deviation interval and budget parameters to describe the uncertainty in the microgrid. direction, while the rest of the period is the nominal value. Such extreme scenarios are almost impossible to occur in practice, resulting in a strong conservative result of robust optimization. Therefore, it is necessary to improve the uncertainty set based on actual possible situations to reduce the cost of robust optimization. Conservatism, improving the utility of robust optimization results

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