Multi-objective planning method for power distribution network frame structure transition considering load flexibility requirements

Abstract

The invention discloses a multi-objective planning method for power distribution network frame structure transition considering load flexibility requirements. The method comprises the steps of inputting power distribution network line parameters and construction, operation and maintenance cost information; establishing an objective function with the minimum total cost present value and the minimum system average power supply unavailability in a planning period and voltage deviation constraint, power supply node active power constraint, line current constraint and connectivity constraint of the power distribution network according to the line parameters of the power distribution network and the construction operation and maintenance cost information; according to an opportunity constraint planning theory, modifying the voltage deviation constraint, the power supply node active power constraint and the line current constraint into an opportunity constraint considering the load flexibility requirement; solving an objective function and constraint conditions by adopting a classical multi-objective algorithm which performs non-dominated sorting by utilizing an elitist retention strategy to obtain a Pareto front edge, and sorting individuals in the Pareto front edge by utilizing TOPSIS to obtain an optimal solution of a problem. The method is a better combination scheme which gives consideration to both reliability and economy.

Description

technical field [0001] The invention relates to a multi-objective optimization method. In particular, it relates to a multi-objective planning method for distribution grid structure transition considering load flexibility requirements, which is suitable for grid structure planning in an intermediate transition year when the target year grid structure is determined. Background technique [0002] The distribution network is the part closest to the user in the power network. Scientific optimization planning for it can ensure the rationality of power grid construction, the safety and economy of power grid operation, and improve the quality of power supply in the distribution network. According to the differences in the planning years, grid structure planning can be divided into planning for the long-term target year and planning for the intermediate transition year. Among them, the grid structure planning for the long-term target year only involves a specific time node, but it ...

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Problems solved by technology

[0004] The load of each node has strong uncertainty during the transition process in the middle year. This flexible demand will affect the line planning scheme of the distribution network; at the same time, users have higher and higher requirements for power supply reliability. It is difficult to meet the requirements of reliability by planning the network structure for the goal

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