Power distribution network optimal dispatching method and system considering new energy and electric vehicles

Abstract

The invention belongs to the technical field of power distribution network dispatching, and particularly relates to a power distribution network optimal dispatching method and system considering new energy and electric vehicles. The method comprises the following steps: building an electric vehicle charging load model based on an electric vehicle charging starting moment probability density function and an electric vehicle daily driving distance probability density function; establishing a wind power generation power model based on the wind speed probability density function, and establishing a photovoltaic power generation power model based on the illumination probability density function; considering a user load, an electric vehicle charging load and a new energy output load to a power grid, and establishing a power distribution network comprehensive optimization objective function by taking the minimum power distribution network load fluctuation and the minimum power distribution network operation cost as an objective; and solving the comprehensive optimization objective function of the power distribution network by adopting a genetic algorithm. The electric vehicle charging can be planned in order, the influence of the electric vehicle charging on the power grid is reduced, and the operation cost of the power distribution network system is reduced.

Description

technical field [0001] The invention belongs to the technical field of distribution network dispatching, and in particular relates to a distribution network optimization dispatching method and system considering new energy sources and electric vehicles. Background technique [0002] As my country continues to promote the structural reform of the energy supply side and promotes the transformation of the energy development mode from extensive to quality and efficiency improvement, new energy sources such as photovoltaics, natural gas, wind power, biomass energy, and geothermal energy have become my country's response to climate change. important aspect of energy security. With the depletion of oil resources and the aggravation of air pollution, our country conforms to the concept of green travel and has introduced many preferential policies for electric vehicles to vigorously promote the development of electric vehicles. Under such an environmental and policy basis, the retenti...

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Problems solved by technology

[0003] Relevant studies have shown that large-scale disorderly charging of electric vehicles will further increase the peak-to-valley difference of the power grid, and a large amount of charging load will lead to an increase in the voltage drop of the grid nodes, and the voltage drop will lead to an increase in power loss and a decrease in the operating efficiency of the power grid.

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