Design method for reducing cross section of wind farm output wire

Abstract

The present invention discloses a design method for reducing a cross section of a wind farm output wire. The method comprises the work of preliminary design, reduction coefficient calculation of a cross section and verification. First, based on a design capacity of a wind farm, preliminarily selecting a wire cross section according to economic current density; then, according to environmental characteristics of the wind farm, in combination with a mathematical relationship between a wind speed, along with environmental factors, and a wire current capacity, and by separately using a screening loaded mode and a Bayesian analysis method combining with Markov Chain Monte Carlo, performing effective reduction on the primarily selected wire cross section, so as to determine a wire design cross section of a output wire; and finally, performing verification according to a continuous limit conveying capacity, short circuit thermal stability and a depressurization condition under a heating permitted condition. The method disclosed by the present invention can combine with an actual working condition to perform design and selection on a wind farm output wire, and compared with a current selection method, a cost performance can be further improved when safety is ensured.

Description

technical field [0001] The invention relates to a design method for reducing the cross-section of sending lines of onshore and offshore wind farms, and belongs to the engineering design technology of sending lines. Background technique [0002] The investment cost of the wind farm is high, and the sending-out line is its main component. It is necessary to propose a feasible design method for the sending-out line that meets the reliability requirements and saves costs. The ampacity of the sending line is determined by the temperature of the wire. At the same time, the wind speed and ambient temperature of the working condition of the sending line affect its heat dissipation and indirectly affect its ampacity. Accurate calculation of the coupling relationship between the three has important practical engineering applications significance. [0003] The design of the actual wind farm send-out line is often based on the ampacity calculated under the 100% constant load rate and t...

AI Technical Summary

Problems solved by technology

Unfortunately, at present, there are very few researches on the effective design and selection of wind farm transmission lines in my country, and there are not many related patents. Designers often design based on the full-power working conditions of wind farms to meet extreme working conditions.

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