Offshore wind plant submarine cable wiring acquisition method

Abstract

The invention relates to an offshore wind plant submarine cable wiring acquisition method. The method comprises the following steps of according to an electrical connection graph of an offshore wind plant, acquiring an adjacent matrix among nodes of the offshore wind plant and using the adjacent matrix to express a topology mode in the electrical connection graph and a branch weight among the modes; according to a Dijkstra algorithm, acquiring a shortest path graph and calculating an influence coefficient of each branch according to the shortest path graph of two end points of each branch; multiplying the branch weight in the adjacent matrix by the corresponding influence coefficient so as to acquire the weight of the branch and form a new adjacent matrix; for the acquired new adjacent matrix, using a Prim algorithm and taking a summit of a tree as a lead so as to acquire a minimum spanning tree W; according to a direct current trend equation, calculating a current value of each cable, selecting a submarine cable model so that a current-carrying capacity parameter of the submarine cable is greater than a calculated current value, determining a parameter value of each segment of the submarine cable and calculating submarine cable investment cost of the minimum spanning tree.

Description

technical field [0001] The invention belongs to the field of new energy power generation in electric power systems, and in particular relates to a method for obtaining submarine cable wiring between selected wind turbines and between wind turbines and offshore step-up stations in an offshore wind farm. Background technique [0002] Due to its simple structure and flexible wiring, the topological connection method of tree-shaped collector system is widely used in offshore wind farms. The physical meaning of the topology optimization of the power collection system is to find the topological connection mode of the power collection system with the optimal length of the submarine cable, and it is believed that the cost can also be optimal at this time. The commonly used optimization method is the minimum spanning tree algorithm. Its basic idea is to use the offshore booster station as the root node, and the other wind turbines as leaf nodes, and use the length of each path as the...

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Problems solved by technology

[0004] In the minimum spanning tree search process, the weight of each side is the length of the side. For the purpose of minimizing the sum of the weights, it is easy to abandon the long side near the offshore booster station and choose the short side as the branch. Doing so may lead to very long branch circuits that collect high currents, ultimately affecting the total investment cost of the submarine cable

And some short sides far away from the offshore booster station, although their length value is small, they have to go through a long path to reach the offshore booster station, so even if a small current is started, it will be boosted The submarine cable section in the station path has a large influence

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