Wind power plant overhead flexible conductor section selection method

Abstract

The invention provides a wind power plant overhead flexible conductor section selection method. The method includes the steps of firstly, collecting historical typical meteorological data to generatea design area historical typical scene library; secondly, calculating wind power plant generator output under each scene to generate design line current carrying capacity requirements; thirdly, calculating conductor current carrying capacity under each scene; fourthly, performing optimized selection on conductors, calculating evaluation indexes, testing constraint conditions, performing technicaleconomic comparison on different alternative conductors, and judging whether an optimal choice exists or not; if so, selecting the optimal conductor, and if not, executing the fifth step; fifthly, increasing alternative conductor types or relaxing the constraint conditions, and executing the fourth step again. The method has the advantages that overhead conductor sections in and near a wind powerplant according generator output features, regional historical meteorological data and technical economic analysis, the sectional area of the used conductor is lowered, and the economic efficiency ofelectric design selection is increased.

Description

technical field [0001] The invention belongs to the field of electrical design of electric power systems, and in particular relates to a cross-section selection method for overhead flexible conductors in wind farms considering the coordination of fan power characteristics and conductor dynamic ampacity characteristics. Background technique [0002] my country is extremely rich in wind energy resources. As the country continues to increase investment in the wind power industry, the installed capacity of wind power is increasing day by day. As a new design object for wind farms, its design business volume is gradually increasing. In this context, in the design process of existing wind farms, a single fixed and low wind speed setting value (such as 0.5m / s) is still used in the calculation of conductor ampacity setting. However, the cut-in wind speed and rated operating wind speed of common fans are generally greater than the set value (such as about 3m / s-10.5m / s). Fully consid...

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Problems solved by technology

[0004] In order to solve the problem that the optimal selection method of wire design in the existing design regulations cannot fully adapt to the characteristics of large fluctuations in wind power generation and the number of available hours is not high, this invention proposes a method that considers the coordination between the power characteristics of the fan and the dynamic ampacity characteristics of the wires. The cross-section selection method of the overhead flexible wire in the wind farm, taking into account the output power characteristics of the wind turbine and the dynamic ampacity characteristics of the overhead wire, fully taps the power transmission potential of the overhead line, and improves the economy of the selection result of the wire cross-section

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