Power distribution network double-layer optimization scheduling method considering wind and light uncertainty

Abstract

The invention discloses a power distribution network double-layer optimization scheduling method considering wind and light uncertainty, relates to the technical field of power grid regulation and control, and adopts a probability modeling method to construct a double-layer optimization model by constructing a representative scene to approach the real-time uncertainty of wind power, photovoltaic output and load. The double-layer optimization model comprises an upper-layer optimization model and a lower-layer optimization model, the upper-layer optimization model is a distribution network reconstruction optimization model, minimum network loss is taken as an optimization target, and a hybrid genetic algorithm based on a backbone particle swarm is adopted to optimize a network switch state to obtain an optimal network topology structure; the lower-layer optimization model is a distribution network operation optimization model, takes voltage quality optimization as a target, and obtains an optimized scheduling plan of reactive power output and energy storage active power output of the wind-photovoltaic power generation system and the capacitor bank by solving mixed integer stochastic programming; and solving the double-layer optimization model to enable the double-layer optimization model to reach a stable state, and obtaining an optimal scheduling plan and an optimal dynamic network frame topology of the power distribution network.

Description

technical field [0001] The invention belongs to the technical field of power grid regulation, and in particular relates to a double-layer optimal scheduling method for a distribution network that takes into account wind and solar uncertainty. Background technique [0002] With the promotion of environmental protection policies and new energy development policies, distributed power sources are increasingly integrated into modern distribution networks, making the traditional power system gradually transform into a new power system form. Under the background of high penetration rate of renewable energy generation, the intermittent nature of distributed generation and the high impedance ratio of the distribution network may cause voltage fluctuations or even exceed limits, bringing greater technology to the voltage control and economic operation of the distribution network. challenge. The network reconfiguration technology is an important means to support the optimal operation ...

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Problems solved by technology

[0004] Moreover, there is a lack of coordination between the traditional voltage regulation and optimal dispatching methods, which fail to fully consider the optimal dispatching potential of distributed power generation, and ignore the randomness of distributed power generation and load.

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