Virtual power plant dynamic flexibility evaluation method

Abstract

The invention relates to a virtual power plant dynamic flexibility evaluation method and belongs to the technical field of power system operation control. According to the method, a virtual power plant is equivalent to equivalent energy storage equipment and an equivalent generator, network constraint conditions between the two types of equipment are decoupled through a robust optimization method,and then parameters of the equivalent energy storage equipment and the equivalent generator are calculated through a two-stage robust optimization algorithm; and finally, the regulation capability ofthe distributed resources is accurately described, a scientific decision basis is provided for participation of the virtual power plant in power grid regulation and control, and the method has relatively high value in practical application.

Description

technical field [0001] The invention belongs to the technical field of operation control of electric power systems, and in particular relates to a dynamic flexibility evaluation method of a virtual power plant. Background technique [0002] The virtual power plant is an organic combination of multiple distributed energy resources in the distribution network. The virtual power plant operator realizes the optimal scheduling of internal resources through supporting control technology, so that the virtual power plant participates in the operation of the power grid as a special power plant . However, the characteristics of flexible resources in virtual power plants are different, and the output power of each device in virtual power plant is limited by network constraints. Therefore, in the optimal operation of a virtual power plant, it is necessary to meet the capacity constraints of equipment, branch capacity constraints, and node voltage constraints, and also to meet time coup...

AI Technical Summary

Problems solved by technology

However, the characteristics of the flexible resources inside the virtual power plant are different, and the output power of each device in the virtual power plant is limited by the network constraints

Therefore, in the optimal operation of a virtual power plant, it is necessary to meet the capacity constraints of the equipment, branch capacity constraints, and node voltage constraints, as well as time coupling constraints such as the energy constraints and ramp constraints of the energy storage equipment. , which brings difficulties to the flexibility evaluation of virtual power plants

Images