An electrical system planning method for offshore wind power clusters

Abstract

The present invention relates to an offshore wind farm cluster electrical system planning method. On the basis of providing an onshore power grid structure and all possible grid connection points, a specific access capacity of each grid connection point and onshore power grid expansion are optimized according to a total access capacity of an offshore wind farm cluster by using an artificial fish school algorithm; wind farm clustering is performed according to the access capacity of each grid connection point obtained through optimization at an upper layer, and offshore transformer substation locating and sizing is optimized by using a genetic algorithm; unified topological optimization is performed according to a transformer substation locating and sizing result at a second layer, to obtain a new onshore grid connection point capacity and expansion result, the new onshore grid connection point capacity and expansion result is redelivered to a fitness function of a second-layer geneticalgorithm, to guide offshore transformer substation locating and sizing, and repeated iteration is performed till the onshore power grid structure is no longer changed, wherein an output is an optimalsolution. Compared with the prior art, according to the method, both economical efficiency and a reasonable degree after onshore power grid expansion are considered, and an onshore power grid and anoffshore wind farm cluster are integrated, to optimize costs and benefits.

Description

technical field [0001] The invention relates to the field of grid-connected offshore wind power, in particular to a method for planning an electrical system of an offshore wind power cluster. Background technique [0002] my country's maritime industry is developing rapidly. According to the planning of the coastal provinces, by 2030, the total installed capacity of offshore wind power in my country is expected to reach 100GW, of which, Guangdong Province is expected to build and put into operation 30GW of offshore wind power, Fujian's offshore wind power installed capacity is expected to reach 3GW, Shanghai, Jiangsu and other places are about 6GW and 14GW respectively. These data show that in the next 10 years, a large number of offshore wind farms with different scales and different offshore distances will be built and distributed within the range of 10-100 km along the southeast coast of my country, forming an obvious offshore wind power cluster. According to load data c...

AI Technical Summary

Problems solved by technology

[0003] The existing research on the electrical system planning of offshore wind farms mainly has the following two problems: 1) Starting from the electrical connection of a single offshore wind farm, the grid connection method of independently constructing the offshore electrical system and connecting to the onshore grid connection point is adopted

Its purpose is also to solve the optimization problem of offshore wind power clusters, but it does not consider the optimization problem after connecting to the onshore power grid

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