Optimal operation control method and system of AC-DC distribution network with photovoltaic-storage complex

Abstract

The invention discloses an optimal operation control method for an AC and DC distribution network including an optical-storage complex, establishes a relevant mathematical model for installing PAE nodes in the distribution network, determines the objective function and constraint conditions of the PAE nodes, and optimizes the first-layer PAE nodes ; use the variable P after the first layer optimization PAE Instead of the active load of the installation node, generate a new state value of the node load; establish the AC and DC power flow model, VSC mathematical model, uncertainty model of fans, loads, and photovoltaics in the distribution network; determine the objective function of the second-layer robust optimization and constraints; establish a two-stage robust problem mathematical model, use the C&CG method to decompose the robust problem into a main problem and a sub-problem, and carry out the second-level optimization solution. Also disclosed is a system using the above method, including an objective function building module, a constraint condition setting module, a measurement module and a control module. The advantages are: the local consumption of renewable energy is realized, and the purpose of maximizing the utilization rate of renewable energy is achieved.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method and a system for optimal operation control of an AC / DC power distribution network including a photovoltaic-storage complex. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the increase of the penetration rate of renewable energy in the distribution network, how to maximize the use of renewable energy has become a research hotspot. The "Guiding Opinions on Promoting the Development of Energy Storage Technology and Industry" also pointed out in the 2019-2020 action plan that the combined application of energy storage, distributed power generation and centralized new energy power generation will be promoted, and the development of load-side energy storage will be encouraged and supported. In addition, more and more components wi...

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Problems solved by technology

[0005] To sum up, there are no researchers who have optimized the joint operation of photovoltaics and energy storage at present. The optimization objectives of the proposed control methods and operation strategies are relatively single, and they do not fully consider the uncertainty of the actual operation of the power system, which is not robust. Rod

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